I am a child passenger safety technician. This is a wonderful little budget seat. It only harnesses to 50lbs though so keep that in mind when purchasing. It does turn into a high back booster once the harness is outgrown. This seat does not turn into a no back booster. Since the straps need to be above the shoulders for forward facing, you can expect the harness to be outgrown around age 5. The booster fit fits well on most children. Please contact a cpst in your area if you need help installing or making sure that you are using the seat properly.