So many things! It's really easy to grasp and being productive from minute one. I can use the same source code, with really minimal changes, in order to deploy a same product on several OSs for Desktop projects (Windows, Linux and macOS); and even creating native apps for iOS that I can distribute on the official Apple AppStore. I think that the key is that its a real RAD (Rapid Application Development), where the own XOJO IDE plays an exceptional role in the way it simplifies the designing of the UI and also compartmentalizes the code. I also would like to point out the Remote Debugging feature, that let's me code in macOS and test my products on Windows and/or Linux, for example. That's really a time saver for me!

The language, the people the debugger, the native fast build products. The team behind it ware very friendly and also believe in the product.

Xojo gives you the ability to create powerful applications for a wide range of targets from one tool. It has simplicity for beginners and flexibility for professionals. Xojo also has a very helpful community forum in which Xojo employees often participate.