I think the thumb layout is more comfortable and easier to use. Kinesis users I've put in front of my prototypes come up to speed pretty quickly. Non-kinesis

I think the thumb layout is more comfortable and easier to use. Kinesis users I've put in front of my prototypes come up to speed pretty quickly. Non-kinesis users seem to come up to speed a lot faster than they do when confronted with the kinesis' bowls. Also, it's a lot more portable. And it's really, really fully programmable.