I use it a lot and currently don't recommend it. If one of the computers is a laptop that goes into sleep, when you bring it back out of sleep it will, most of the time, be unable to find the other computer(s) (and will claim they cannot be found) until you exit Mouse without Borders and relaunch it (Edit: on the laptop). At least, that's my experience. I'm about to try switching to Barrier.

Mouse Without Borders has been ubiquitous on all the SEMs I’ve used (where up to three computers can be used together). I’ve never had any problems with it. Now, the SEMs on the other hand…