I like that they have the index marks on the top of the clamp, I really find that useful for (counter) shift panos with a TSE lens. The R/L lever flip is neat and my be useful when with some lens plats the camera body can get too close to the clamp. Will the screw adjusting the tension loosen through many cycles of open/closeing? One of us will eventually find out! I guess the spirit level is designed to level the clamp before putting the camera in it. Then you adjust the composition and can no longer see the level?
One feature I don't like is that the lever cam seems pretty circular, there does't seem to be any intermediate, half open position as with RRS. In the half open position on RRS, the camera or lens plate can slide in the clamp and adjust its position, while it is still securely held from sliding out (presumably the lens plates have stops). This adjustment feature is useful for the shift panos as mentioned above.
Mike K