I find it very easy to pump up my pad with this pump. it is a little tricky to keep it open while you start to roll the top, but it's manageable. Also, when i bought this, i was afraid that the air would just blow back out since you cant get to the valve while the sack is one there, but it turned out that air hardly escapes anyway until that very last pump, and by then, your taking the sack off anyway. After that, it's one or two blows from your mouth to really firm it up and your set for a comfy night of sleep. My only (minor) dislike about this sack is that my BA Insulated Air Core 20x78 pad wont fit in it horizontally. but thats really not too big a deal.