Depends on what is meant by best, of course. It does work well. Takes about 25 pumps to fill my small Neoair. It's sort of like doing CPR. Place your hand over the hole and press down. Lift up to allow the foam to self-fill again and repeat. Main downside is it's heavy - 5.5 oz for the one I have. But it's a comfy pillow, too. I didn't take it last time to save weight. Just used lung power, but I may give using my trash bag a try.