I have a Copenhagen wheel which I use 1-2 days a week for commuting. I swap it on and off one of my bikes. Total weight with the wheel is around 35 lbs which is reasonably light for an e-bike. I've run the battery down before and pedaled with no assist and it's not a big deal but I wouldn't want to do it all the time. The extra weight makes the bike sluggish. When I have it on I use it in the highest assist mode as I'm interested in shortening my commute. I don't really pedal any different than without the wheel but my commute times are shorter.