1221c

My conversion (Volkswagen New Beetle) had done 3.700 miles so far (2.100 miles with an D&D motor, 1.600 miles with a Warp9). I used a Curtis Controller (1221C upgraded to 1231C) all the time and consumed 37 kWh/100mi or 370Wh/mi (charge included). At a car weight 2866 lbs (1300kg) it's OK, but...

I switched my decision and ordered a Curtis 1221C controller for my conversion. Now I would like to get some feedback from all of the EV-Drivers, which have some experiences with this type of controller. Is there anything to know about it? Some special characteristic, that no technical sheet...