I babysit my nephew 99% of the time. He just turned 4 years old and is a very big boy weighing in at almost 50 lbs. He is very tall as well. We had him in a high back booster seat but he seemed to be growing out of it plus the expiration date was drawing near. I just went and bought my daughter a high back booster seat and needed to get my nephew one as well without breaking the bank. I figured since he isn't always with us that I would purchase a Cosco high rise booster seat that can be easily removed from the car when my nephew isn't with us. I was surprised how much I ended up liking this booster seat. It fits him really well and he isn't too big for it. The only thing that I wish was better was the cushion area. I wish it had a little more cushion in it for him but overall he seems happy with it and I do as well. He did get into my daughter's booster seat one day and was a little too big for it so I believe this one was the perfect fit for him without breaking the bank.