Decent device, inflates quite quickly and is somewhat noisy, although it doesn't bother me. Just like others have written, it doesn't inflate all the way, if you want something to be at its limits (e.g. a sleeping mattress) you have to do it manually with a hand pump.

I got it for very simple things and it's great. I would prefer it to be connected to the socket to avoid battery consumption as much as possible.

It inflates to a certain point, but if you want it to be well inflated, you will have to continue with a manual pump.
You save a significant amount of inflating. In other words, I am not impressed by the pressure it raises

For the money, it is decent but only for very specific uses. It is quite small and portable, ideal for inflating children's life jackets, air mattresses, small inflatable boats, etc. It is generally intended for inflatable toys that do not require pressure, with an emphasis on "small". I do not think it will help with anything that has significant dimensions (e.g. inflatable boat for 2+ adults) or requires pressure (bike tires, regular soccer/basketballs for which it also does not have the appropriate adapters). Even in small inflatable arms, it will practically inflate up to 80% and the rest will need to be filled by blowing with the mouth, as soon as the pressure starts to increase inside the toy, the pump does not perform. One question is how long the 6 batteries (typical cost about 5 euros) last.

It does its job quickly, but it is very noisy. You have to inflate it away from people, otherwise you will annoy them

Very convenient for camping gear (mattress, inflatable) and very convenient to take with you if you have a motorbike and can't find electricity. I would like it to be rechargeable, even if it was more expensive, but I can't find it anywhere in the market. I highly recommend it.