Yes I have a license for Purebasic.
I found it cumbersome in a way and have used it little since I bought the license.
I have since used B3D, never Max, and found that Freebasic was more comfortable than purebasic.
I rate them by ease of use:
1:B3D
2:Freebasic
3:Darkbasic
4:Purebasic
Yes, I'm sure someone will write that Purebasic is way better than Darkbasic in functionality, yes it is.
*** Also, this thread was the first time that I had heard of AGK, whatever it does.