[sudont]

Creator does look great, but so does Interface Builder. IB has caused me to leave the computer in a state of shock from frustration, so I'll have to reserve judgement.

Performance is fairly good. I get around 5 seconds on a 4s, and about 8 on a Nexus S, though I haven't tested with recent code on the Android Phone. The only native API I've used has so far been push notifications. While there's a plugin for that, it works as a pretty thin bridge between native code, and a couple of dispatch functions that use stringByEvaluatingJavaScriptFromString. I've had to fix things, so it means having to understand Cocoa code anyway.

There are also some visual issues with the code, in that the view will save its state if the user uses a route in a view to change the current view. Normally this would help, but if it frequently updates the view changes back and then it flickers.

Overall it's ok if you really love web tech, but I'm learning native iOS development in response to my experience.