I have been using REALbasic since v1. It is the only real multi-platform RAD that really works. I began developing on the Mac and then adapted most of my products to Windows very easily. I love the interface and the online documentation. REALbasic community is also as a big family, you can exchange ideas with developers including the CEO!... Personally I think I can talk about that product as a long time professional developer. Take some time testing it, subscribe to the many mailing lists and if you have problems share them there, not here. 5 years ago I started my own company thanks to that amazing product and actually I am very proud of it. Note that I was using Delphi on the PC and CodeWarrior on the Mac before.