Im still put off by having to cofigure a seperate esc and sound board to it. That adds up space fast and has got to be a pain to learn so much more to make your own sounds with whatever chip you get and the costs add up. Im sticking with IBU old base models as long as i can till they arent available any more. I womt be buying any more ultimates unless they add firmware code to get rid of the inirtia lag.