My big complaint, though, is that I've only been using this for 2 or 3 days now, and I've already got an issue. Under the arrows, it felt like there was an extra slight bit of padding in the top piece of the pad, sort of to give the buttons a "raised" feel. Well, on day 3, these things have already shifted away from their buttons. And since it's inside the top piece of the pad that has the actual circuitry, you can't just go shift them back into place. Kind of hard to explain, so I've attached crude drawing of what I'm talking about. Assume the red pieces are little embedded pieces of padding that originally started directly under each arrow.
At first I thought it was designed that way, like for extra sensitivity because I've noticed in videos that heavier players today are keen on pressing only the extreme inner edges of arrows. But no, I've felt and watched them move as the days pass, and there's no uniformity to them on any axis.
It's problematic because it throws off my bearings. I've already almost rolled my ankle because in the middle of a 500-step song, the bumps made me get misaligned and take a step off the left edge of the pad.
If all of this happened within the first week, that cannot bode well for the rest of the pad's life. :/
EDIT: The padding I criticized in my review has now become a mountain in the middle of the pad with the far edges protruding into the inner side of each arrow. Bearings are being thrown off even worse now because of it. This pad didn't even last a whole month for me!
EDIT2: After months of "dealing with it", other buyers have stated that the manufacturer is aware of these issues, and have new batches available that should improve the design. I'm currently starting a warranty replacement process, so we'll see how it goes. Hopefully it lasts more than a few days and can get 5/5 it deserves instead of the 3/5 it got. :)
EDIT3: Replacement pad came in today; Kudos to DPM, the turnaround time was insanely fast and it was hassle-free. Played a medium-heavy-ish sessions today and the inserts are holding up so far. So hopefully they will continue to do so in the coming weeks.
EDIT4: Pad is back up to a 5-star rating. Whatever caused the issue beforehand has apparently been ironed out. Pad is still responsive and without a mountain of padding in the middle.