Yes they're loud.
I've been trying my replacement kit. Double hits on the yellow cymbal again. It's very rare but it does happen. I suspect it will get worse and the orange will start to go soon. I'll keep running it in but this looks like a full refund job at this stage. I'm not paying 3 times the price of the WT kits to have one that doesn't work. Perhaps I'd be better off trying the new GH kit that they've modified to (apparently) be more durable.
Looks like this hole in the market is still there to fill. I really would have thought Logitech would have done this properly but this product seems to have been designed by a room full of chimps and quality tested by three-toed sloths.
Logitech's reputation for quality has been tarnished here and their outright dishonesty in marketing is disgusting. All vendors throw a little spin on their products but the advertising for this product is outright lying which is not only ethically disgraceful it's prohibited by laws in many countries.
Taken straight from their PR:
"fully adjustable"
No it's not. It's about 10% adjustable.
"The drum heads have a lively feel and barely make a sound."
They make a racket and have no rebound at all. The cymbals are especially bad.
"Designed for Guitar Hero®, the controller lets you take advantage of all the latest game features."
No it doesn't. Accent notes work randomly. Hardly ever.
"Sets up quickly, folds flat"
It takes the longest of any product in its class to set up by far. And it does NOT fold at all. There's no folding.
"the pedal is highly durable. So you can go ahead and give it all you’ve got."
Yeah... I wouldn't recommend it.
This claim:
"Extended battery life"
Is true. The WT drum kits chewed through batteries. The logitech set would be about 50 times more efficient there (no I'm not exaggerating).
In spite of the false advertising the kit is good to play and doesn't feel flimsy like the WT one (and doesn't need new batteries every day). When it's working it performs quite well but the cymbal double hits and the cymbal design (I needed multigrips to untighten the plastic lock-nuts after playing one song) are killing it.
Logitech will take a loss on this one as it's far too expensive for people to not bother refunding. And it's already earning a very bad reputation so it's not going to sell well in the long term.
Fix the cymbal design and you've got a winner (pedal is a bit crappy too). And send me the new cymbals! 
The "double hit" on the cymbals is worrying me (I've only heard a few reports of this: So far our contact rate to sales on the customer support side has been a little low, which is usually a good thing, but I want to track these issues). I'll PM you to see what I can do about swapping that cymbal.
I'll tell you why I'm interested in this: We spent a lot of time coding some nifty features into the drum kit's "brain". Beyond the drum kit's autocalibration routine (That on the fly watches how you play and adjusts to what YOUR soft and hard hits are like, and registers those as such. And then if someone else takes up the drum kit, adjusts to those hits within seconds), the drum kit also looks for false hits to reduce those. If you're seeing double hits, there's probably something localized in the cymbal. Though, could you try something for me? Could you swap the two cymbals and see if it follows the cymbal, or if the problem lies in the brain?
