I have had no issues. All my apps continue to work as expected, operation is still smooth. Battery seems about as it was before on Andy 11. Admittedly, I don't push the envelope -- just a normal user. Working well for me, so far.
Thanks for the feedback, I'm glad to hear the beta's coming along nicely. Hopefully that means the public release will be pretty solid as well. If I wasn't allergic to beta's I'd be right there with you