I received it this morning, so here are some initial thoughts:
tl;dr - it's fantastic!
It really does feel like a quality keypad. At first I was a little surprised by how much travel there is in the keys, but the more I tried it, the more it felt right. There is a nice positive "click", and assuming that translates to accurate key-presses (as I believe it will), I'm certain it's a winner. As is the case for all smaller keypads, it will take a while to get used to the arrangement; particularly the space button, but one can certainly quickly adjust to a new keyboard, especially if you're using it regularly. They keys themselves are well spaced, and I feel that I can quite easily press each of them individually. The only uncertain press was 'b' as reaching over it felt like I might be pressing other buttons at the same time. However, this isn't possible to check without actual input, and it's something that would be easy to adjust to anyway.
I also like that you could use the shoulder buttons as modifiers - would make using emacs (if I could ever get used to those commands) much easier. I didn't feel that the shoulder buttons sat naturally under my fingers, as my fingertips sit slightly farther back towards the middle of the device, but again, it's something that I could adjust to. In addition to adjusting, the case being sent around isn't the final version (apparently it's got different parts from different versions of cases too), and the shoulder buttons don't actually click, so it might actually work perfectly naturally.
The d-pad being demonstrated, again, isn't the final version, and indeed felt mushy. However, one of the earlier versions of the keypads (keymat?) felt really good, so I'm confident that the final version of this will be perfect.
As for aesthetics, the keypad does look gorgeous! So much, in fact, that in my opinion, the transparent case is shown up, and doesn't quite match the sleekness of the keypad.
My original images were apparently too large to upload here, so I resized them...
First up is a close-up of the gamepad buttons. Likely it's because the pad has been manhandled quite a bit, but there is some visible wear on the Y button, and is beginning to tear.
Just a close-up of the new version without the key caps:
Start, select and Pyra buttons:
The case and full keymat. I do feel that an opaque case would do the keypad more justice:
Close-up of an older version:
The older revisions. When I tested the d-pad here, it did feel really quite responsive, and would be perfectly acceptable as-is. As mentioned, the one in the case isn't correct, and indeed, it feels it.
Size comparison against a 3DS XL; less wide, same depth, but taller. I do like the shoulder button placement on the DS
Just a different angle:
And another:
And finally with it next to my current 'ultra-portable'
Alongside the worst keypad I have (which was marginally improved with the printed keypad)
And just a final one for those who think I simply don't like transparent cases:
Hopefully there'll be another update in the next couple of days, before I send it on again.