no real conclusive answers as of yet Raider. As far as the Sensei goes, it's basically an 'updated' xai. It uses the exact same sensor, but the shape has changed slightly and they've added some gimmicky features ie. led lights etc. I've got one preordered and it should be arriving next week so i can give you a definite answer when i've used it for a while.
Your best option atm would be to wait and get some feedback about the Sensei before purchasing
Posted on Saturday, 10th September 2011