Dd is only 5 so I'm not wanting to put her in a lbb bc it is smaller or anything but bc her hbb is defective now and can't be used with the back. I have another hbb but sent dh to check the dom and its expired it was one my grandmothers sister gave us that her grandson used. I really don't have 40$ for a booster. Everyone tells me to use it as a lbb but my concern is there's no head support in our backseat just the glass