I personally prefer water and air that comes without all of this work, but sometimes a hand pump is the best and most convenient thing to use. I have a pump for the bikes and the balls and all the kids’ toys that need to be blown up all the time. They work no matter where you’re at – there doesn’t have to be electric hookups close by and you can take them practically wherever you go (down to the beach, out to the park). I keep one in the trunk of the car and in the camper so that we always have one when we need one. I have recently discovered that there are electric pumps you can plug into a cigarette lighter which is pretty cool, too.