The Kinesis Advantage 2 is an absolutely wonderful keyboard.

It costs an arm and leg and takes a while to learn, but it makes every other keyboard I've touched feel downright archaic!

I wish they would do a better job on the firmware. I still love this keyboard, but the fact that they haven't updated their keyboard controller since the USB version came out is a bit sad (please let me know if they have).

If you have a modifier-heavy workload the keyboard gets lost. A few times a day I have to flip through all the modifiers to get one unstuck. Probably once a week I have to power cycle it since that isn't sufficient. there is so much room in the case I also wonder why they haven't invested a little effort and made a bluetooth with battery option - I've been sorely tempted to do this but never could justify the time.

The thing I really like* about this keyboard aside from modifiers on thumbs is that you can effectively use it on your lap and shift positions. it feels a little more like a musical instrument that way.

I've never had a problem with modifier keys, but I do have a problem where sometimes it's unresponsive after my computer boots up, and I have to un-plug it and re-plug it. Bonus: If the plugging-in motion isn't quick enough, I have to try again. Sibling mentioned updated firmware on the advantage 2, I wonder if there's a way to apply that to the original.

I have the same sticky modifier problem with a USB advantage. Apparently they upgraded the firmware and fixed the problem for the Advantage 2 though.

I've never encountered this with my Advantage 2, I've had it about a year now.

Something I've been thinking about getting is a clip on 12 inch monitor + RasPi, it would be such a great remote development setup for cafes.