I haven't updated to 3, but I have to assume it is probably better than 2. That being said, there are a lot of good features in 2. I use the MIDI grooves and have purchased some of the packs. I use the grooves a lot and depending on approach I can have the drum parts knocked out pretty quick. I will sometimes add to the drums to give it more personal flavor (record a new MIDI track and route to the EZ channel or add to existing MIDI). I really like the labeling, verse, chorus, bridge, fill and there are some presets for different drum mix.
I haven't really used other drum plugins much, I do find EZ and the SD drums and their MIDI packs very good and very usable.