I tried some generic ram from them, i'm not sure what brand, but it worked great the first day, then after that it was nothing but lockups. It happened to be in the middle of a show I was doing where I was playing video straight off of my PB. I had to reboot 4 to 5 times per show during the show. After I took it out, everything worked just fine.
Hopefully I just had a bad stick of ram and it's not all bad.