I've had a play with it and without going into too much detail (mainly because it was a while ago and I cant remmber the exact details ) theres some really nice features in there, but if your used to working in maya then you'll notice some glaring ommisions. not being able to redifine hotkeys was the most noticable one for me... also i found the graph editor a little odd too but i guess its all down to what your used to.
Best place for info on it from other users would probably be the messiah yahoo egroup - was pretty active and very friendly.