I have been testing Ubuntu 12.10 because it will be the base for Mint 14 and I am interested in Unity's development. Recent updates to 12.04 were giving me numerous problems from graphics glitches, strange error messages and even a shutdown problem where the system told me it could not shut down because Compiz was still running.... I was able to fix the issues for the most part but I have been reading that 12.10 would have considerably better graphics support so I decided it was time to see for myself.
I installed 12.04 on a laptop with ATI discrete graphics and on a computer with on-board NVidea graphics, both systems run 100% better! I should mention that I used the September 29th daily build on the system with NVidea graphics because I had read that there were issues with NVidea before this build. At any rate all of the glitches with the user interface seem to be resolves as well as the random error messages I was seeing in 12.04. Hardware wise 12.10 seems to be better than 12.04, at least on both my machines.
As far as Unity goes, I like the new version better than the last, not that there was anything really wrong with the last version. I think removing the 2D option made things more stable and less troublesome. I know that some will not be happy with the 2D option being removed though. I did not like the Amazon and Music store icons in the launcher by default and they were the first things to go. I do not mind the shopping lens too much, you can filter results after all but it will be better when the off switch for it makes it into the repos. 12.10 seems stable but memory use is higher than it was in 12.04, this might change by the time the final release rolls around though. As I understand it, the remaining development time will be spent on bug fixing.
What is your experience with 12.10? Do you feel that the hardware support has improved since 12.04?