Summary: I have this running my 2nd, 24" monitor on a Dell Optiplex 3020 i3. It works perfectly, with one little caveat: the computer won't start with it plugged in. If I unplug it, start the computer, I can plug it in immediately and (when Windows comes up) it works fine. I can't tell that I've had any problems, my machine never crashes. I have a support ticket in to Eclipse, I'll try to get back here and update this if anything changes.
Does not support OS 10.9 or later, customer service is not helpful.
Devin Halleran, Amazon
4 December 2014
Summary: I use a MBP. The product worked adequately for a while, although there was quite a bit of lag time to my second monitor. However, the product stopped working after the upgrade to Mavericks. I called customer service back in October 2013 and they said they were "working on it." It's now December 2014, Yosemite is out, and they still haven't figured it out. To top it off, their customer support phone line has been busy for over 3 days now and e-mail with them is too slow.
Summary: This is the SECOND one of these I have purchased. They work so nicely, and contrary to what some say here, I've had it working on Windows Vista AND Windows 7 - haven't tried it on Windows 8 though. Would recommend to anyone.