In full auto, with the OD button in (meaning you have OD), the box will do all the changing up or down for you all the time, if you want to go V-quick in this mode press your foot right to the floor, then you will hit the down change switch (look on the floor under the peddle, the box will drop a gear and you will be in Wide Open Throttle, zip...
The auto from 0 - 60 is quicker than a manual because the gear changes are quicker.
If you put the system in Manu mode you use the auto shifter a little like a manual gear, you use the change button every time you change, and you start off in L (1st) then change to 2 (2nd) then D (3rd), no OD in manu. This mode is good for a bit of controlled speed for fun.
You can also use it in auto but using L - 2 or D, for example, if you were in 2 then the system will only use 1st and 2nd up or down, this meens if you dont want to go too fast but you want a good sound out of it at 3 or 4,000 rev's then 2 is good.
Hope this is of some use to you.
Cheers.
Bob.