I'm LOVING SD3, I've only downloaded 2 of the Libraries. I figure I'll wait on the rest for when I'm ready to mix, right now I am in preproduction. One thing I'm not loving is the ride, to me it's missing something. Something else, I never had SD before this but I recall seeing kits with a crap ton of cymbals, but not so with SD3 and I'd like to have a separate Bell not just the one on the ride.
That being said, this thing is light years beyond AD2 and SSD4 (which I always loved) I don't know that I'll need another drum software again.
p.s. As I said above I am in preproduction on some projects, one I am going to program drums, I've had great success thus far with the midi grooves and the midi editor. Another project we are going to use a TD 20 just to record the midi and another we're going to do the drums but since we don't have all the gear we're just going to worry about getting clean tracks to import to the tracker and let it do its thang. I'm excited about this, I just wish it came out when I was 30 not 40, I'll easily spend the rest of my life finding reasons to record just to use it.