I don't have much experience with Massdrop, and got lucky so far and had no problems with the few drops I got from them either. But, I did read about screwed up drops and issues that keep coming up. They probably stretch more than they can handle, but manage to get a pretty buck in the process ... The thing is, they afford to do it, because they offer what a single person dreads the most: the handling of the groupbuy itself. If, in the process, they take the idea and make it their own, and manage to screw up the difficult things, that's the price to pay for allowing them to run the groupbuy. The price of convenience.
So, for me, the thing is: if somebody has a new idea and wants to make a groupbuy, what other choice does he/she has? Run it alone, it's a big headache, and it does have its risks. With Massdrop, you have somebody *else* to blame.
Ideally, for Deskthority, a similar, smaller, entirely-keyboard-oriented entity, based in Europe, would be ideal. But who would take on such a burden?