how is the #hillTopper sprinter kit for going up a big hill in a hurry with an empty 110lb #superCargo bike for a 200lb dad in a hurry? Not terrible. But you should get a bigger motor if you want to do this a lot. I'm doing 16mph on the flat/slightly uphill, had been running the motor at max for 2min at that steady pace up Bertha (60ft climbing.) Then another 70ft climbing in about half the time. Would be easier without cars in the way.