ICS update on Galaxy S2
The update process was smooth enough, but the phone is less responsive, less stable, and uses more battery than before. With Samsung's TouchWiz, ICS and Gingerbread look very similar and I mostly regret doing the update. Some folks at the various forums have suggested a factory reset, as you did on your Droid. I did not think it would help much and have not done so, but I hear this more and more so I may have to hunker down and do it despite the obvious pain involved in reconfiguring the device from scratch.