I am quite impressed, once I managed to get it installed. Tablet devices seem to require side-loading as according to the store, they're 'incompatible'.
I've only used it for navigating the menus, starting up iPlayer, and controlling the web-browser, but so far, it seems pretty reliable, functions well and is reasonably clear in operation. My only feedback is that there should be an option to reverse the swipe functionality to make left=right and vice versa, in the same way as other slide navigation works. Or has Apple got a © around that?