Thanks! I'll check those out.
I have the Kenesis Freestyle2 and I find it unusable without retraining much of my muscle memory.
1. The extra 2 columns of keys on the left edge somehow reliably disorients me.
2. the lack of an extra (potentially redundant) row of keys on the inner edges throws me off b/c I tend to reach across the middle from either side, e.g. press B with my right hand.