I bought this because I was too lazy. lol jk it's very comfortable for highway driving and no air pumps. I charged it at home for the first time, but quickly realized that I needed a charging box with a specific voltage. It was easy to use common sense. The pressure to inflate a tire or ball is the same as an air pump. I can not complain. Now if only the tote bag was a little bigger, I would make an impeller. kmsl jk