I have the smaller pump that I bought a few years ago, and it took about 10 minutes to put air in my queen size mattress.  I bought this pump for a recent camping trip and was delighted that it took less than a minute to completely fill my queen size mattress!  GREAT product!  Also, it holds it's charge for a long time.  I charged it 2 months before my trip, put it in the box and didn't think about it again until I needed it.  It was still well charged and I easily aired my mattress as well as that of 3 other people - and then deflated my mattress as well.  :)