L.H.
I use the Radian 65 for my children and they find the seats to be comfortable. My daughter is very tall for her age and the seat is not too narrow at all. It does sit low, but my daughter is still able to see out the windows without at problem. The Radian seats are heavy (about 20 pounds), so I would not recommend them if you are going to do a lot of switching seats or taking it with you on plane rides.