Drums has five different drumkits and a percussion kit, all of which use a technique I worked out to affect timing- basically, it delays low-velocity hits slightly so anything that uses a range of velocity information develops a completely intentional 'swing' that feels more like drums. I can demonstrate how that's supposed to work- these examples apply the technique to both bass and drums (the free bass also has this).
This is one example with the default Logic instruments, a random noodle with velocity information, and how that sounds quantized hard. You'll notice it's really stilted (and notice what default sampler instruments sound and feel like).
Now, an example with the Airwindows instruments, on the exact same MIDI noodle, still quantized.
That's within a mix context, so here are sound clips of every sound in the package, so you can hear what you get. Each sound has lots of samples (sometimes more than a hundred per sound) in velocity layers, round-robined.
All the kits come in four forms allowing for different sorts of gating, because it's neat to be able to play MIDI drums staccato for effect- also, there's options to either have round-robined hats that you have to control the duration of with note length, or 'live' hats which aren't round-robined, cut each other off and can be used with e-drums. All those forms draw on the same samples so they don't require extra disk space.
Drums is $49.99.
If you can make this free bass guitar EXS24 instrument, ElectricBass, work, you'll be able to use the drumkits- even if you're not on Logic or not on a Mac. (They go in Library/Application Support/Logic/Sampler Instruments if you are using Logic 8.) The 'demo this plugin' button links to the bass guitar instrument.