I have gotten the hang of shifting seamlessly.
I do get a skipping in 3rd gear at high engine loads and low rpm, but it doesn't seem to bother it.
Ist and second gear are fine. Remember to put some oil in the little cap (mine is plastic and seals very well).
Having gears is great, probably put a hundred miles on it so far.
I am a little disappointed that the milage only gained a little with gears- up to about 120 mpg.
I ride mostly bike speed (15- 20mph) with bursts up to 25 (on the governor- set low) if needed.
I see no way to bump start this deal. The hub will freewheel.