Smooth trigger pull doesn't have near the friction of a slide trigger w/o a roller sear. Fast pull, and personally I think they are easier to pull for longer periods of time. Easier to time for me.
Triggers are not as light of pull as slide triggers, after all it is a lever and fulcrum. Didn't like the height difference at first, but you get use to it. Mine came with out grips, which was no big deal since, I am partial to my old hogues.
I am still using a 99 STO 3-way so I haven't reached the full potential of my frame. Just don't forget to swap your lp hoses around, it makes them backwards. I like it better that way, since it looks cleaner.
Mine came with the cam adjuster, which made adjusting trigger stops super quick and easy. Definately get it, too.
I upgraded to this from an ANS Quickfire, which is a smooth frame, but I have never once considered swapping back. The only thing I miss about the slide is how light the trigger was with ultra-light trigger return springs and sear springs.