
This keyboard has been in the market for quite a while, and I was able to snatch one off eBay for $15 in mint condition. I'm very satisfied with this keyboard. Extremely light and portable, yet has an excellent key feel quality--snappy, responsive, with a very nice tactile feel--I think it feels better than all the other Microsoft keyboards, which feel mushy by comparison. Has more key travel than a regular laptop keyboard, and is pleasingly tactile. And it looks damn cool.

Here it is in all it's diminutive glory. Like the Das Keyboard, being shiny means it is sort of a fingerprint magnet in the long run. But I can live with that.

How does the arc shape works? Quite nicely. It gives your hands more surface area while keeping the size compact and nice. Quite comfortable.

The keys have a nice dished shape that's very hard to capture in pictures, but it does make the keys feels very nice and help you avoid hitting the key edges and miss keystrokes.
Things some people might not like? The cursor movement pad takes some time to get used to, although I've found a "trick" when using it by "rocking" my index finger on it to move the cursor. But it's definitely something you gotta get used to. The Home, End, and paging keys are at the top of the keyboard, with F7-F12 available by pressing the Fn key on F1-F6. So the layout is a bit odd. It does have dedicated audio keys, which I dig.
But what I most like about it is the key feel. There's something about the tactile feel that I just love. I know, very subjective, but it is what it is, I guess.
I have been using it for coding at home (since I have a very small office) and so far, so good! I love not having keyboard cables around my tiny desktop. With this and my Microsoft Touch Mouse, I have a nice, compact solution for my compact office.
