I find the FLX Buzzzes to be less predictable from disc to disc than the Z, Cryz or ESP. I used to have one in my bag as part of my Buzzz Team, but when I wanted to learn the Meteor, I took out all the Buzzzes. But, the FLX plastic is really nice if you play in the winter. It stays soft. Cold, hard plastic on cold hands can be rough sometimes.
The Cryz on the other hand is really consistant. Every time I've lost a Cryz I've replaced it and the replacement disc flew just like the old one when it was new. Z too. ESP, not as much.