Even great for Recumbent bikes.
My wife and I have recumbent bikes, and have had them for almost 20 years. We ride almost every day. My wife recently had a knee replacement, and has had difficulty on some hills. We have researched E-bikes, and have decided to keep the comfort of of our old bikes. Hilltopper, seemed to be the best choice, so I bought (2) 20" Horizon kits. Since our bikes are quite different than most, mounting the battery bracket took a little longer than I expected, but not bad. Now we are loving the ride more than ever, and no hill has been a problem. Thanks Hilltopper!