Yes, we build and test our own kernels and userland tools and figured out which kernel versions work and which ones don't. You've got to keep a close eye on the IRC channel and mailing lists. We never had any data loss but a lot of unplanned downtime until it got sufficiently stable - for our use case - a few months ago.

Works well but we'd rather not have to worry about these kind of things.

(even before it was deprecated, it was marked a "technology preview", rightfully so - if you want to use btrfs, you need to stay very close to mainline)