This is an excellent car seat. We use it for our daughter, who is going to be 4 in a couple of months, but is closer to the size of the average 5 year-old. We had started to look for a larger car seat for her just like this one and were disappointed that Chicco didn't have one at that point, because we love all of our other Chicco products! Thankfully, just before we bought another brand, this one was released! We love it and so does she! She has said several times, "I love this car seat!" We still use this seat in its 5-point harness set-up, so I cannot honestly review the seat as a booster only. But as a harness seat, it is easy for our daughter to get in and out of the seat. The straps are nice and long and easy to put on her/easy to buckle. Out of all of the Chicco car seats we have used, this one is definitely the easiest to pull the straps tight and the straps have really never gotten twisted or tangled. It is really nice that it has 2 cup holders as well as a removable little snack/toy tray. The only downside with the removable snack/toy tray is that sometimes it falls out easily or can easily be bumped out and fall to the floor; the lid on it also rattles from time to time while driving. However, it is a nice, functional feature, as well. The lining of the car seat does not zip off on this model to wash it, so just be aware that it might be a bit harder to clean than some of the other Chicco car seats. Overall, though, this seat is excellent, our daughter loves it, and we would definitely recommend it to others. It's also so great that we will be able to continue to use it for her for a long time, since it will convert to just a booster seat, as well.
(Chicco provided me with this product in exchange for an honest review; all thoughts and opinions are my own.)