let me cite from the unix-hater-handbook:
"Sure - the new filesystem will corrupt your data. But look, how fast it is!"
The Clue with btrfs is: I tested it a while ago, it was fucking slow at writes and i decided that i don't like it on my main machines. Imho btrfs is a wonderful thing with netbooks and small notebook - machines, where you mostly need high reading speed. Given that it is reliable and have reliable tools for crash recovery.