just took it for a 20 mile ride. it seems nice. it is idling too low so sometimes the engine cuts out when almost to a stop. it's leaking gas somewhere, I saw it dripping from the carb. the chain stretched out considerably or the tensioner loosened a little. I did the tensioner gorilla tight but maybe not tight enough.
I don't know how fast I was going but definitely faster than a nice lightweight road bicycle for sure. I got a 40 tooth sprocket on the back wheel with manic mechanic adapter. it seems like a good mix between torque and speed. I weigh 155lbs so no problems on the hills. it accelerated up them.