I've been using it on two boxes for about two months.. like adaware pro's active thing and spybot's it can get a bit annoying.. ESPECIALLY if you have all three running. I can't decide which I should trust more.

the only negative thing I've seen about prevx is that it interfered with one of my son's apps he uses in conjuntion with AIM.. (remoteaway) but even with that, I couldn't find out which part of prevx caused the problem because after I renabled each section I had disabled, it continued to work.. hmmm.. oh well..