I love AppCode! It's like having resharper for xcode! it's an amazing productivity boost.
I use it all the time, but only as code editor.:(
I keep building and debugging with XCode, since the build times are significantly faster.
My project depends on three20 and unfortunately it has to be built with the project (http://three20.info/article/2010-10-06-Adding-Three20-To-Your-Project).
In Xcode the first build time is long but the preceding ones are really fast, however in AppCode, each build I notice it builds all over again the Three20 projects.
I want AppCode to be my only IDE for objective-c, but currently I have to use it along with Xcode.
Am I missing something? Does anyone has a better solution for using Three20 to reduce building times?