I have 4 because I like them a lot. They seem to work better on Windows 7 than on 10. The mouse and image lag seem to be slightly larger. but overall they are still great. I mainly use them for the monitors on my PC which have entertainment programs running in the background that I don't interact with much so I don't mind if the mouse lags. Somehow the sound and the picture always match, and that's the most important thing for me. I work pretty hard on 6 screens so it probably has something to do with the lag I'm feeling and unless you plan on working as hard as I do, you're probably going to have a better experience than me. If you don't have a very easy or obvious way to add another screen to your computer, I definitely recommend this USB option for a quick fix.
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