I've seen Btrfs at work, It's under developement, but it's stable enough: I use it in production for my virtual machine storage pool, and I can get far better results in terms of R/W performance than mdraid.
It's really a great FS, RAID configuration is easy, flexible and you really can have a cool performance upgrade with compression.
I'm going to install Mint with Btrfs also on my DELL Latitude.
I've powered it with a SanDisk Extreme 480 Gb, and to get the most out of it I'll use Btrfs.. here a tutorial I wrote in order to install on btrfs having separate subvolumes for home and root:http://penzoditutto.blogspot.it/2013/02 ... ebian.html
hope it helps.