I wish there were third party tools that handled cocoa properly. I can't stand Xcode 4, the whole thing is atrociously bad, especially with limited screen real-estate (I do all my iOS coding on a 13" MBP). With Lion, animations in Xcode now chug and choke.

It really is one of the worst development environments I've ever used. Of course, I'm also spoiled, having used Visual Studio for most of my development career. And though that has its warts, it rarely gets in the way of letting you develop, and when it does, someone, somewhere, has written an extension that fixes it.