What do you like best?
The language. Ruby is one of the best designed languages and CocoaTouch is one of most stables frameworks to develop software applications.
Using Ruby to create iPhone applications feels really well.
What do you dislike?
The lldb support, if you need to debug on one line; you need to use lldb and the support to the pro/pri is really bad. You can't call methods or take the parameters value to print into lldb.
It's hard debug with RubyMotion
Recommendations to others considering the product
Until now RubyMotion don't have Swift support and debugging with lldb it's hard considering the console you have in execution time and when you need to stop execution.
What business problems are you solving with the product? What benefits have you realized?
An invoice system for Mexico, the main benefit was the easy creation of components and UI elements in my app.