So far so good. iCloud keeps asking me to log in, and I have one app broken. But I like what I've seen so far in 10 minutes.
I feel you, these betas can be a headache and a half if you don't like messing around with things. I didn't have to do any of that though, I just synced my phone and did the update. Everything came over,
Edit 1: Hahaha I turned my device off/on and got locked out of the Developer Program. Update y'all again in a few.
If I used a jailbroken device I wouldn't go for the beta either.
Edit 2: If you don't register your UDID, you can use the beta. As long as you don't turn your device off. So either show some patience, or use one of the UDID registering services people are selling. (Or fork over $99 for your own developer account)