I tried that around summer 2000. So, my information may be a bit out-of-date as far as experience goes...

Perforce is, IIRC, just a little GUI built on top of CVS. It integrates (supposedly) with Your Favorite Tool, but I could never get the .DLL to work with JBuilder, which is the environment I was using at the time.

I tried for a few weeks to get it to work. Their sales staff was nice (they wanted to sell it to me, so of course they were.) We could never get multiple users to be able to access the system at the same time, which the demo was supposed to be able to do. Couldn't get "the other" user to see changes that "I" was making. (Which user is which is swappable in this instance.)

So, we couldn't get the demo to work properly. Therefore, we didn't buy it.