First off - we LOVE Graco products. We currently own 6 of their car seats and have owned multiple other Graco items - always great quality. This one missed the mark in my opinion in that it doesn't attach to the vehicle. While this may be fine for a normal booster (just the bottom part), in high back mode this thing moved all over the place with a smaller child. (8 yo, 46 pounds). I did not like that when unoccupied it could potentially become a flying hazard in an abrupt stop or accident. Returned and purchased a different model (Atlas 65 2 in 1 Harness Booster). We own 2 other atlas 65s and couldn't be happier. 5 point harness for the 4 yo and seatbelt for the 8 yo... attached to the vehicle and VERY safe - Atlas 65... much better.