Well, there's a few reasons. First off, I know they're really good quality. Heavy duty. Soundguys regularly use these mics on my kit when I play live, and I've seen them beaten and battered and they just keep on working. I always pay attention to the mics on my drums when I play live, and these Audix mics have always impressed me. Secondly, I've had recording experience with the kick mic (D6) and the snare mic (i5) and I like them a lot. And the i5 has the added bonus of being a kick ass guitar cab mic. It's every bit as good sounding as a 57, but with a milder upper midrange. It sounds a little smoother if that type of sound is ever something I'd want. The other mics in the pack were pretty much a leap of faith. The D6 and i5 are so awesome, I just figured the tom mics would be as well. I like that the pack has a D4 for the floor tom. And I'm using my old CAD kick mic for the biggest floor tom. Just about any SDC is better than what I was using for overheads, so again, it was just a leap of faith. I haven't been disappointed. The matched ADX51s are nice. I don't know what else to say about them - they just work and sound accurate. They're much cleaner than the CAD junk SDCs I was using before. Lol. I'm not a big mic guy. I don't have a locker full of mics, and don't want one. I'd rather just sound good, and when you do that, you can get good recordings with just about anything. I'm sure I could piecemeal a set together, but I'm not that interested. Really, for the same price and relative quality, what can I put together one at a time that would be better than this Audix kit? I'd still want a D6, I'd still want the i5 or another 57, and I'd need 4 tom mics and two overheads. For the money and quality, I think it would be hard to beat this DP7 pack. And lastly, it came with 7 new Audix cables and the neat little carrying case. I needed new cables too, so it all worked out well.