We have DD (7 years) in a Frontier 85(?) and she's still in it harnessed. Just got DS the latest Frontier model with Clicktight, and I LOVE it. The installation was so easy, and uses the seatbelt so you don't have to worry about when your child's weight (plus the weight of the seat) exceeds the limit for using LATCH. I didn't even realize this was a thing until recently, so I had to reinstall DD's Frontier using the seatbelt (no Clicktight) and it was a pain! I did manage to get it in there, but I hope I never have to take it out!!