Yeah, I have had some big issues with 7.10 on a test install I did. Luckily, I did not upgrade my main Ubuntu installation and I think I'm just going to wait until 8.04 comes out. Keep in mind, they intended to be very aggressive about implementing experimental features into 7.10 but they will be heavily focused on stability and reliability for 8.04 since it will be an LTS release.
If you do try out 7.10, be sure to check Launchpad and submit any bugs you may come across. I had two big bugs on mine setup and they were both already in Launchpad, but you should submit a bug report if you find one that is not in Launchpad.