Looks solid and well made. The 4 year old grandson can be strapped easily, it can also open the belt when getting even. Have vaulted backs (no pronounced bucket seats), but it does no noticeable gap behind the seat on. The width does not disturb the neighbor. For relatively short journeys in rare grandchild visiting the booster seat is ideal, otherwise I would prefer a child seat only because his wing chair-like seat, to which the little fellow can lean your head sideways when he falls asleep.