I bought the Evenflo Chase in Feb 2013 for my 2yr old daughter because I needed one for my new car and was leaving the old one in my mom's car. She has loved it since i bought it and still does, and i dont think she will be too happy with just a new high back booster. Just found out tonight she has passed the harness weight limit by +10lbs (although she fits in it perfect and still has plenty of room harnessed, which I wished she was not over the weight limit of harness). I wished the back was adjustable since her head is about an inch from the top. I bought this seat thinking I wouldn't have to buy her another due to the weight limit, but due to her height and weight, looks like we will be buying something else this weekend :-( LOVE THIS SEAT!