The review is extensive; it would be easy to lose the forest for the trees, in terms of features and gestalt. Anyone who hasn't tried the Advantage 2 should consider that along with the Advantage 360.

Bluetooth, function keys, and plastic shine aside, the key question for the 360 is whether tenting, splaying, and adjustable width makes the ergonomics better.

Advantage key wells help maintain a neutral and stable major axis of the wrist (flexion/extension). That's the main cause of carpal tunnel, and a proven benefit.

The 360's tenting, splaying, and adjustable width help

- maintain neutral minor axis of the wrist (radial/ulnar deviation)

- reduce arm tension for wider shoulders and/or more arm muscle tone

- maintain neutral forearm pronation

Unlike key wells, none of these axes are actually in use while keying; they are stable, so they add tension but not overuse. On the other hand, an under-appreciated benefit of splitting and tenting is that they reduce your ability to lean on the keyboard to compensate for posture issues, and may reduce the tendency to hit keys hard.

So feature-wide, the split/tented design has ergonomic promise, but might not be a significant benefit if you have good form with the Advantage. So yes, it is worth trying on feature grounds.

The gestalt is a bit more like your take on engineering complexity, and whether additional degrees of freedom are optimizing or confusing. Either way, it depends on your ergonomic profile: necessity or desire.

I started with necessity: RSI makes you exquisitely sensitive to excess tension and movement. But soon it became desire: I found that I can think more clearly, and feel much more fresh after a long day, when keyboarding is effortless -- if I need no more focus on typing than I do on my tongue when speaking.

Like a marriage (or Steve Job's rock tumbler?), getting to effortless requires endless work chipping away even tiny sharp edges; observing your muscle tension, noticing what key combinations are usable and memorable. Building touch typing fluency, including syntax and commands for multiple applications, into muscle memory. It's much closer to engineering backends at internet scale than prototyping on rails for 300 clients. You may even find that smoothing your own ergonomics makes you happier and more vested in a long-term approach.

I have an Advantage2 with a magic trackpad in the middle (like maximilianroos), and a tilted tray with raised platform for mice. I've used the Kinesis deep-well split keyboards for ~24 years, and would pay 5X the price if I had to. The company has fantastic support and now is battling a flurry of pop-up product managers offshoring me-too design and manufacturing. High-end keyboards are a small market, and I wonder how long Kinesis will last.

The 360 is mostly unobtainium. They sold out in hours, crashed the website, and only now (months later) announced another limited tranch available via third parties.

If the 360 is interesting and you don't have an Advantage, consider the Advantage2. Give yourself a 2-4 (exclusive) weeks, to the point where you can touch-type and forget about the keyboard. By then you'll either be on board with continuous improvement or not, and the 360 will be just another increment to try.