The ease of use! We can develop our own applications without having any prior experience in programming or software design/development using this toolkit. It is also very easy to learn how it works (it has excellent documentation). Everything runs perfectly fine when we are developing an app with about 10 different screens that includes many forms - all at once!! There were no problems while working together during several months; however I have experienced some minor bugs here-and there which required me only few minutes to fix them myself by searching online resources such as StackOverflow etc., so nothing major really since those issues did not prevent us from finishing what was needed until then anyway. In addition, its cost effectiveness makes things even better because you don't need much money up front before being able to start creating your first simple apps. Also if something goes wrong after releasing the product, support will be.