This is an absolute hillclimb time-attack monster of the keyboard world. The performance, responsiveness, and overall experience are excellent.
I only noticed two minor drawbacks:
Cable routing clips: There is a dedicated cable channel on the bottom of the keyboard with small plastic clips that hold the cable in place. Unfortunately, these clips are quite fragile and broke off rather easily. This does not affect the keyboard's functionality at all, but the plastic could definitely be more durable.
Spacebar stabilizer guides: The plastic guides for the spacebar also seem quite fragile. One of mine broke even from a soft dusting brush. It is possible that it had already been damaged during shipping and the brush simply dislodged the remaining piece of plastic. Again, this does not affect the keyboard's functionality.
One thing I would love to see as an option in the future is a 100% full-size version with a zinc-alloy case, next-generation switches, and a 4 kHz polling/response rate. I would absolutely be interested in buying such a version.
Aside from these minor issues with fragile plastic parts, I have no complaints. An excellent keyboard that I would gladly buy again.