Worst IDE ever. Really. Since the update to the XCode 4 (forced, to be honestly), I'm not coding my apps, I'm FIGHTING. Everyday I'm fighting with all the issue this crapy IDE has: with the syntax highlight being turned off occasionally, with the autocomplete disappearing, with the crashes, crashes and crashes everywhere, with the UI being changed a little bit with every freaking update, that are actually issued twice a month.
I have to force myself to work, every single day - just because I HATE this damn XCode. I never had that much bad emotions with XCode3, although it was pretty weak as IDE comparing to, let's say, Visual Studio.
Damn, and there is no alternative, actually!