I have been strapping it just one time over the top. I forgot to strap it coming home yesterday and it didn't move even with some disturbingly rough roads and a couple sneaky quick turns (construction zones on the interstate). I would hate for it to get away and start beating up the interior though, will definitely do a better interior walk around before taking off next time. Dealer never even mentioned there was a tie down, found it on my own after getting it home the first time.