Oh, posture is good. But I'd rather have good posture on a keyboard with keys lined in direct columns etc.
(Truth be told, my Kinesis Advantage sits on my standing desk at work where I spend most of my screen time and typing. I'm tying on my MacBook's chiclet.)
But you could even type on this crap and be comfortable, because posture fixes the problem instead of masking it, like that Kinesis.