I've been using a non-official v5.0.0.411 for over a month and I'm so happy with it.
Everything works great EXCEPT the battery drain is annoying! So you need to charge it twice or more everyday.
Some users, however, claimed that if you wipe the bb with BSAK and then install the v5.0.0.411, the battery drain will disappear!
I HIGHLY recommend this version