Just tried this out for the first time after researching all the options for getting my bike-mad 2-year-old back uphill to our house/anywhere in Devon. It works a treat. We took his balance bike out as I wanted to be sure he'd put his feet down if any problems. I was on my electric bike. I started in a low power mode to reduce any sudden pull, but it makes no difference - there is no sudden pull with this thing. My son took to it immediately and the only problem came when we got to the top and he wanted to be towed downhill! I can see this being very useful when we go to the trails at Haldon Forest and it will enable us to go out on proper rides from our home as well. Highly recommended.