My wife and I each have a Model S, purchased several years ago and now with over 6,000 miles on each. After one year, the main controller on both bikes needed to be replaced and Electric Bike Company did so at no cost. Since then, after two more years of regular riding, there have been no further issues. We still use the original batteries, which I believe have held up because I charge them regularly during the winter. Battery capacity has diminished slightly, but that is normal. We live in Northeast Pennsylvania and ride on secondary roads with a lot of hills. In this terrain, with the batteries being three years old now, we get about 50 miles per charge. At the Jersey shore, where it's flat, the range is much longer, 75+ miles. The bikes have sufficient power to climb long, steep hills. They are very solidly built, using quality components -- brakes, tires, etc. (Get yourself a set of toe clips, for use with regular shoes/strapless. You'll be glad you did) One consideration I would note to potential buyers - especially older riders - is the weight of the bikes. With battery, they weigh 65 pounds. This provides a solid, steady ride, however if you're going to be loading and unloading them on a car rack, it's do-able but not fun. You'll need a trailer hitch on your car to use a rack such as the Thule platform. In order to load the bikes (assuming you have two) you'll need to remove the front baskets or else you're going to have a devil of a time getting them both on. This becomes tedious if you use the car rack a lot. If this situation is yours, I highly recommend getting the rear travel bag that sits on top of the rack as opposed to the front basket. In general, though, we absolutely love these bikes and recommend them to our friends all the time. I would buy another bike from Electric Bike Company for sure.