I both own and have used many digital and analog scopes due to my career as an engineer. However, I wanted an inexpensive scope that can be used with a PC for presentations. I bought a Hantek 6022BE for that purpose, and while it is very similar in features and performance to this OWON VDS1022i and nearly half the price, the software was not very good. The OWON was purchased based on positive reviews. I was not disappointed. While the features and performance are good for an inexpensive scope, the software is a big improvement to the Hantek. One example is the FFT feature, which I use, is pretty useless in the Hantek as it is displayed in a manner that does not make it easy to view or take readings. The OWON allows for a better display of the spectrum information and allows for easy measurement as well. Preset measurements, such as rms, rise time, etc., are much better with the OWON. The software allows for Printing, Screen Capture, and saving the data of the wave form(s) in a file with several popular formats to choose from.Now as an oscilloscope it has the advantages (easy to save and display data) and limitations (low bandwidth and waveform distortion near the the top end due to low sampling rate) of an inexpensive digital scope. The 25 MHz bandwidth is limiting, but the 100 MS/sec allowed for display of about 30MHz sinusoidal signals with minimal distortion. The record length is surprisingly limited at 5 kB. It comes with 2 basic 60 MHz, hard plastic, 1x/10x probes. [The Hantek's are a bit better.] It was relatively easy to setup with the software, documentation and drives included on a CD. You can download all the material from their website as well. The units gets it power directly through the usb connection on my laptop. However, it has an additional usb connector that can be plugged into a 5vdc power supply if you wanted to use it on an Android phone like the Hantek can with a proper adapter and software not included. It runs well on my 8 year old HP laptop (i7 with 8 MB)using the latest version of Windows 10.The product has serious EMI issues. Proximity within 2 feet of a USB hub power supply results in 60mv of noise on the signal from a B&K battery powered audio signal generator. Moving the Owon further from the power supply and hub improves this to 5mv but it does show a seriously bad design for test equipment. Note that the same setup with my other oscilliscope (Velleman handheld) shows 0mv of noise. With this OWON you will never know how much HF noise is a circuit problem or just spurious noise from the OWON being near the equipment being tested. It works best direct to laptop running only on battery.Previous reviews of the non-isolated model by experienced engineers have noted the same noise problem, and I submit that it is due to poor EMC design quality, not due to lack of isolation.The software is crude from a human factors standpoint, but it does function. The CD that came with it is useless and won't load on W7, you have to download from Owon both that and the USB driver, which doesn't self install, either. Owon's software overall seems like it still needs work.I really like the peak sample mode, which shows higher frequency signal noise and oscillations even when the sample rate is low. Alas, you don't know how much of that higher frequency noise is just OWON artifact.Edit- After comparing this to a Picoscope 2205 MSO, I've decided to upgrade my review from 2 to 4 stars. The built in isolator saves $39 which makes it a $60 scope. Yes, the Picoscope fried my laptops's video extender (to a remote workstation) while working on a 120VDC 1A pulsing circuit that the OWON with isolator did with no trouble. For the money, the OWON scopes are hard to beat. The scope works well for everything except low level signals and looking for EMI on signals. Something the Picoscope can't do either since it's got some noise issues too.The OWON software is no where near the polished and professional level of the Picoscope.The biggest disappointment was the print and image save functions. The print doesn't give you anything you can put in a report or you development records- no scales, 2nd trace yellow (invisible) and the formatting is a bad joke. The image save shows the scope screen, but the background being black makes it again, something you don't want use in printed records because you can hardly see the traces. Owon REALLY NEEDS TO FIX THE PRINT FUNCTION! The image save function could also be improved by offering a selectable white background with darker color for the 2nd channel. Then you'd have an image to stick in a printable document. And they should also change the trigger level set software; what they have is time wasting and doesn't get better with use. My bottom line is that for many slower speed 2 ch scope functions, the OWON does work pretty well, and the built in isolator IS important and will save you from frying your PC and connected gear. It's pretty hard to beat that combination for $100.This is on a Win 10 Dell laptop. I only use a scope once in awhile but when I need it I need it. Nothing like a scope to be able to see what is happening and these PC based ones have so many features for so little price. I had one but since upgrading to Win 10 it didn't work and had gone out of business.I bought the SainSmart DDS120 first since it looked about the same features at $40-50 less. But the trigger was iffy at best and mostly didn't work and the reviews on the VDS1022 said the trigger marginal and they were right. So I returned the DDS120 (thank you Amazon) and got this one.Strengths:* the trigger works well.* was able to have a fast sweep to catch the two types of waves in the signal, but then have a long sweep 1S and it showed all the waves as they happened. In my application it had a 5ms wave every 2 seconds with a 2ms wave every once in awhile. It was able to show that and the detail of each wave.* Noticed it had a record feature have not used that yet but that will be helpful.* Able to do simple stuff quickly still some confusion.* Price. Darn cheap for what it does. It has all the features I will need.Challenges:* It assumed you have I CD in your machine I don't. No explanation how to get the software. I looked at the [...]site and found the software to run the scope.* But also it needed drivers and had to jump through that hoop, they are also found on the site. So you must load the PC software and then the drivers. Only reason I did not give this a 5 but a 4 is because it did not have instructions for a non CD install.* I feel some of the features are a bit confusing. It does have a help menu which helps.The pictures are the two wave forms that are mixed together in my application. But using the 1 second sweep I was able to see all the waves and how they were in relationship to each other. The 1ms sweep I was able to see detail of each wave since the trigger caught them.To me this is a keeper.This is a nice piece of hardware. And, the oscilloscope software is fairly good too. I'm a signal processing electrical engineer, so I particularly like the FFT, frequency spectrum, display. Something an ordinary oscilloscope can't do. As far as installation, the main software installed nicely on my Windows 10 laptop, but the USB drivers were a bit difficult. Almost returned it, but decided to give it one more go. Basically, don't use the .bat files in the USBDRV folder. Follow the instructions in the online manual for USB drivers and go through Device Manager and install them that way. Just select the main USBDRV folder and Device Driver will search all its sub folders and do the install. Had to do it a couple of times, but it finally worked. Make sure the oscilloscope is plugged into the USB port first of course.