Seriously and truly :-) I've corresponded with the maker, and I own two. It earned an IIHS 'best bet' rating, passed all applicable crash testing even in the simulated event of a 'deflation' of the seat during the accident, and it positions the belt absolutely beautifully. It's easy enough for any kid 6+ to use by themselves. I frequently send it to school with my 7 year old. It fits discreetely in the bottom of his backpack when it's rolled up, and I don't have to worry that there won't be enough room for him in a sedan that all ready has two other kids in boosters.
Really a great option for car-pool/taxis/travel etc.
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