I think they discontinued it for a year but caught to much flak and put it back on.
It is geared really low when engaged and would be good for off road in some hilly area's but overall I doubt we'll ever need it.
I plan on just having a chinese 50cc engine on ours with what is supposed to be a 4-speed auto trans but I think it is a 3 but havnt cared to check it out since it wont matter in the long run.
I think I'll do some more work on it this weekend and run it around a bit with the tired old 90cc engine thats in it.
I think it looks better than the plastic mopeds running around.