I just noticed that is is arrived before couple days.
Made some short tests yesterday:
Fullscreen mode works excellent.
Video recording is very fine, and slowdowns not emulation, at least not on faster machines.
Those are key news, as I saw.
What works not:
TOS 2.06 just drops 2 bombs after booting. (I know, it recommends TOS 1.0, but...)
Floppy images of 1600KB (20 sec/track) are not accepted, but they work on real ST (little modded) (And Steem & Hatari)
Having little fun with games in last times I didn't test just couple. They worked like charm in full screen mode .