The bike is fantastic. Up or downhill, into or with wind, I never travel below 30kph. Its amazing. On the downside the kickstand is very feeble and the bike has fallen (with some damage unfortunately) several times. I will have to purchase a beefier stand one day. And when I start from a dead stop using full throttle, there is a slight vibration (which I will have looked into under warranty next spring when I have it out). I suspect that this is not an issue at all as the bike runs perfectly otherwise. I highly recommend this product for anyone. I only wish I had bought it sooner.