I've been using the koolertron split mechanical keyboard for a year now and it's been pretty good so far. I can sit up straighter, my thumbs and pinky don't hurt anymore.

The connector cable in the middle is becoming a little loose and it did not ship with a spare. Would have been easy enough to replace but I can't find any micro-to-mini usb cables. I'm just hoping to splice one together myself once it goes kaput.

https://www.amazon.com/Koolertron-Programmable-Mechanical-Ke...