Honestly, sometimes the sounds are just too good. I kind of wish they had some trashy kit with old beat heads tuned poorly and maybe even in a crappier sounding room. Probably just me.
The one thing I don't like about these things is the tuning feature. All it does is play the sample(s) back faster or slower, and that doesn't work very well for a couple reasons:
First, a real drum sounds different depending on how it's tuned. I mean, beyond the actual pitch, you'll hear a change in the overall dynamic envelope, different overtones will resonate in different proportions, and it really can end up sounding like a different drum altogether. If there's two heads on the drum, the relationship of how each is tuned with respect to the other can have drastic effects, and good drummers use all of these techniques to get the sounds they want/need.
Then the overall frequency spectrum changes. Drum transients, especially cymbals, produce harmonic content way up into the ultrasonic spectrum, but the samples can only contain content up to 22K. If you drop it an octave, you have absolutely nothing above 11K, and all of the air and attack is just killed. Yes, that's an extreme pitch change for most people trying to get a natural sound, but frankly I can hear the change in the "air" and ambience and character with even really small adjustments. I mean really the room itself gets bigger or smaller as you tune the drum - and only for that drum! You might not notice if the whole kit was tuned down a semitones or so, but when it's just one I feel like it sticks out like a sore thumb and just doesn't match the rest of the kit anymore.
There is, of course, nothing to be done to fix that except to include more samples in the packs. Then instead of tweaking the tune knob, you'd just pick a different variation of the drum. Like now some have the same drum hit with a stick or a brush or even fingers, and you'd just have more options there with different tunings. And of course they're not going to include every possible option. A few might be nice, though.