Applications which run on mobile devices have special user interface requirements. I think Apple did a great job introducing innovative controls on the iPhone/iPod touch platfor
mirabyte, it seems good, but you can't try in some test application their touch controls component, the are only provide a sample application. Otherwise, you can't see how to look inside of your application.
In my opinion, you should choice resco, they are working in PocketPC platform many year and they know what is the performance and application scalability, usability, user friendly etc.
Finally, i like the resco's lastest edition of mobile studio 2009.