I love that it comes with two spacers so we can quickly switch between bikes. Initial instal is very simply and fast. Took about 10 minutes since I had to learn how to take my handlebars off, but now that I know how, it would only take 5. Once the spacer is on it only takes 2 minutes to attach to bike. So many adjusting points will make it last for a long time. Our daughter is 22 months old and listens to direction well so we thought she was ready. We've been on 3 rides so far and she loves it. We can't wait to go on so many adventures! Glad I got this over a large bike seat.