I had used this product every now and then for a couple of years. I went for a ride a month ago and was pedaling very hard when there was a malfunction with the gears and the chain and something broke. That gear no longer works on the bike. Because I was pedaling so hard, and all of the resistance in that gear suddenly disappeared, I was off balance and took a nasty spill. I was lucky and will only end up with a few scars.I am tall and weigh almost 200 lbs. So keep that in mind if you plan on buying this. I will most likely still use it, but only to cruise around slowly with my wife and kids. I don't think this bike is very sturdy and I don't recommend it.