Ok i had to go through and read darren's review to figure it out b/c i've never seen one in person .... but yes b/c the seat is so light weight it can be used up to 65 in say a Toyota that doesn't have a limit, where as a honda it could only be used to 40#'s b/c that's their LATCH limit, and there are many variations in all car models usally 48 but some 40 some 60 some don't have them.
The great thing is once you child out grows the 65 # harness (but bylooking she looks pretty skinny) she will likely out grow it by height which is when her sholders are above the hightes harness setting, and the down fall is if you dd is skinny and tall then you don't want to NOT use a harness if the child OR ANY CHILD is under 4 years old or under 40#s ... also a child need to be mature enough to sit in a booster and not lean over to pick something up off the floor or not push the seat belt off their sholder, ect.