I have not been on for a while so I want to make sure this is still a good choice or perhaps there's even a better recommendation out there. This is a car seat for my mother's car to drive my daughters. They are almost 6 year old twins. they weigh about 35 and 42 pounds and are average to short in terms of height. In my car they are in Radians 80s. I prefer to keep them in 5 points harness as long as possible. thx. Elyse