When it comes to car seats Diono has proven numerous times to parents in our testing center’s that they “get it.” The number one priority for parents when it comes to car seats is safety, and when it comes to the Ranier Convertible + Booster Seat our testers told us that they felt assured, confident and comfortable. Next on the list of priorities is ease of use. Once again the Ranier impressed with both installation and the ease with which they could get their children in and out thanks to the low sides. This seat is designed to last until the child is 120 pounds. Since it going to be around for such a long time parents were looking for sturdiness but also comfort. The Ranier has both in spades. Parents were over the moon with the fact that this one seat could serve its purpose for years by changing with ease from car seat to booster. Additionally the seat is easy to clean, comes with a cup holder, features easy to use latches and offers excellent head support for nap time.