Coming from VBA, for me it is difficult to use GUI objects like views, buttons, etc. Some things are the same, other's I don't understand so far.
Example (from my naive point of view as a beginner):
In VBA you can use and change all objects you've created in the designer GUI in a very intuitive way.
In B4A I often wonder why I can not change/retrieve an object's property like I do it in VBA or why it doesn't work or why it only works with THIS but not with THAT object.
Other things are sooooo easy, like "Just start b4a-bridge and connect. Click on Compile&Run..." ... WOW! .... THAT EASY?!