I have an iBook, Powerbook, 3 G4s, and an iMac all using wireless internet all the time. Setting up the Airport is very easy to do, took almost no time what so ever. The Internet did not seem to slow down either. The only time I can tell a difference is when playing a game like Quake 3 or RtCw online while trying to surf the web on a different computer at the same time. None of my Aiport cards have ever burnt out, broke, or anything like that. I have the Aiport set up to use WEP and it seems to work fine.