Just got my set yesterday. There is a pretty big flaw with the cymbal design. The screw in lock on top can either tighten or loosen with play.
Mine played perfectly for 3 hours. Then the screw on the yellow cymbal almost came off. I noticed it wobbling. So I screwed it back in and tested the orange (so tight it was hard to loosen but I hadn't done it up that tight).
Since then the yellow cymbal has been oversensitive or, simply, plain broken. It registers double hits fairly often and sometimes goes off on it's own. I've had star power activate when just hitting the orange cymbal.
I was actually playing this very softly as you don't need to whack it. And it's lasted a whole 3 hours. Not impressed so far for what is a very big outlay for this type of product. I'm going to ring support on the issue soon but I doubt I'll get much more than send it back in and how I'm going to do that for a product this size I don't know. And then the waiting....
Initially - experience couldn't have been better.
3 hours later - as sour as it gets after spending this much money precisely to avoid this exact problem. I expected better quality from Logitech.
edit: update. Support did suggest sending back. Having some issues with the logistics with the seller though. So I've still had the drums and have managed to mostly (but not completely) eliminate the problem by putting the symbols on more of an angle. The more vertical you make them the less the chance of a double hit or going off due to vibration. At the moment they're too vertical for my liking (as vertical as they'll go) but they do work much better. I'll only get a double hit once or twice a song if that (if I'm careful not to hit too hard).
The orange has also started double hitting sometimes when I place it more horizontal. This is obviously a design flaw as the odds of both my cymbals being faulty are very low. The flaw could be fixed with a slightly different (less flimsy and wobbly) cymbal mount design. Don't skimp on the important bits. Everything else is solid where it needs to be.
The pedal is also going a bit "squishy". I wouldn't advise folllowing the challenge on Logitech's advertising regarding the solid design of the pedal that says give it all you've got. You'll probably break it.
The product needs recalling and redesigning. Shame. It's almost there but not quite. So close.
) . Probably you have some issuses with M$ 
Now when we have your guitar. I don't think that M$ will try to create their own GH controlers. They just want more $$$. Am I right?
Drum Controller is waiting for me. I have to make preorder ! 
