Anyone tried it?
I did. At least I tried the compiler, not the simulator.
Compiler seems good, but its data types seem to be missing signed integers and strings. Or I misread. I downloaded/played a bit. It generated good code. The config files for AVRs is missing most of the later AVRs such as the mega32USB. I did add ASM inline and get a teensyAVR board w/mega32USB to blink its LED.
Add-on costs, small, for type longs, and for support of functions and procedures.
It's IDE is well done. Just misses the mark, I would say. Too bad.