I use it full time on my Desktop and my Laptop. It glitches fairly often but nothing unrecoverable. You'll mostly run into issues if you run out of space. Also there's some weird side effects with improper shut-down that you should note. Btrfs tends to leave some stuff in my logs too, but nothing that actually lost data, normally I see the error after a brief lockup in the system.

I'm using it on two machines (both running arch-linux, so it's typically only one week behind kernel.org kernel releases or so), and I have not noticed data loss or corruptions, even though I crash these machines from time to time (with btrfs-unrelated things).

The ability to make daily snapshots effortlessly is godsent on my tinkering computer (so I can rollback whatever stupid idea I came up with), and on a slow laptop with a even slower 2.5" PATA harddisk, I at least have the illusion of a performance improvement by LZO compression causing less disk-accesses.

They say we must wait a little longer...