I honestly didn’t expect a lot from the Tiny Pump but, out of the box, I am very impressed. I questioned whether the pump would have enough power to pump up my air mattresses but it does a fine job. I inflated two mattresses to full capacity, each one taking right around a minute to complete. For reference, the mattresses are both Big Agnes, full-length, one regular and one insulated. If I had known about the Tiny Pump X, I might have gone with that to get the light but I’ll be happy with the regular pump nonetheless. I’m old :-), so it will be nice to get my bag set up without having to be out of breath (and without blowing nasty condensation into my bag).