I was expecting it to be bigger but it does the job on Pilates ball. After 5 months of use, it was fine. However, if I had to inflate it from the beginning, I would suffer.
Update: 1 year later, suddenly it got clogged for no apparent reason. I tried to buy another pump but it turned out worse so I am returning to buy it again

It does its job very well and if a tip breaks, you have two more, it is worth it, very good