I was waiting on the Therion 166, but with little idea how much longer the wait for release would be, I went with a Therion 133 and am perfectly happy with it. There are two differences, other than 33W. The board supports 2A usb charging up from 1A on the 133, and there is now reverse polarity protection built onto the board, so no need for those little round mechanical "protection" circles used to prevent you from inserting the batteries incorrectly. Otherwise, same thing. I decided I didn't really need those features enough to keep waiting.