Haven't begun using it myself just yet, but I have friends who have.
Opinions seems to be a bit mixed so far, but the majority of them are very happy with it.
The ones that are not so happy about it isn't complaining over features and general ability of the program, but rather the absence of "speed".
I think it's just a matter of them having rather old computers that haven't been tuned in a while!!
In thrust I trust.