I use a Kinesis Freestyle2 split keyboard at my day job, mostly because it was one of the available split keyboards available through my work. I really enjoy it so far. The split lets my shoulders maintain a naturally open position, and the tenting allows a neutral wrist position (but unfortunately my hands are too big for the built-in wrist rests).
The only downsides were some initial soreness (I think my shoulders were used to being hunched/turned in), some initially missed keys (it turns out I used to type the letter y with my left index finger, which isn't possible with the split), and more difficulty typing one handed.
Side benefit is that I have a good place to put my coffee and snacks.
Related to shoulders, I found that raising my monitors with arms (budget option: programming books) greatly help reduce the natural leaned-over hunch I'd get from looking down at my monitor. These two in combination have greatly helped my default posture.
The only downsides were some initial soreness (I think my shoulders were used to being hunched/turned in), some initially missed keys (it turns out I used to type the letter y with my left index finger, which isn't possible with the split), and more difficulty typing one handed.
Side benefit is that I have a good place to put my coffee and snacks.
Related to shoulders, I found that raising my monitors with arms (budget option: programming books) greatly help reduce the natural leaned-over hunch I'd get from looking down at my monitor. These two in combination have greatly helped my default posture.