We have 2 HBB which we use in the rear of our cars. We often recently have needed to take 3 children some where so plan to buy another one for using when needed and will leave in one of the cars etc. I am very confused as to where to put it though for safety - in the middle seat in the rear or in the front seat? I often see people with DC in the front but am not sure they always have air bags off etc. Info on line is conflicting. Anyone help?