While the main part of the keyboard looks okay, the keys that are not part of the curve, look painful to reach - especially the function key row. That row would be a lot easier to work with if it followed the same curve, in my opinion. You'd lose the aesthetics, but hey.
There are also a lot of keys on the right side, that make little sense to me: the arrow keys, and that whole cluster. You'd have to move your hand to reach them anyway, which pretty much defeats the ergonomic goal (in a similar way the function key row does).
The big ass spacebar, Enter and Backspace above are also things I dislike. A similar arrangement works fine on the TypeMatrix (for reference, I used one for 3+ years or so), where the layout is a matrix layout. If you have a curve like on this keyboard... I don't think they would be as comfortable. And having such a huge space bar means that your thumbs will have little else to do than smashing that one key, and that's a waste of a strong digit.
Not to mention that there is no possibility of tenting the keyboard, either. There is no wave, like on the Sculpt, yet, that is a very important ergonomic factor. (The Sculpt also has a similar curve, and has the function row curved too - for a good reason)
From an ergonomic PoV, I think TypeMatrix, Sculpt, ErgoDox, Kinesis (even the Freestyle!) are superior to this, for different reasons:
- TypeMatrix does not have any curves, but the function row is easier to reach.
- Sculpt has a better curve, and the middle is raised, making it more comfortable.
- ErgoDox is split, and allows adjusting the tenting/tilting, and also allows you to use your thumbs more efficiently.
- The Kinesis Advantage has a thumb cluster, and the key wells are superior to the curve. Though the function row there is similarly awful.
- The Kinesis Freestlye can be tented, and is split - a bigger gain than the curve in itself.
There may be other options, and other reasons, and while the layout may be an improvement over most, traditional keyboards, for those who want to improve their ergonomics, there are already other, better options as far as I see.