I got the Toontrack EzDrummer for my Logic Pro setup to help me do drums. I am pretty happy with it overall. It is a basic setup and is not to complex. You can edit between a couple of snares, kicks hi-hats etc. and you can control the overall mics in the mix. The extra midi drum snippets are a good bonus but overall they are just a little iceing.
The one drawback seems to be the crash cymbols. They were having a tough time breaking through the sound of the kit while it was playing. I ended up just using a separate instrument channel in Logic with some crash symbols.
Overall I think it has greatly improved the sound and complexity of the music I am doing. Here is a link to one of the tracks i did with it.