The Auto Penis Pump is a breeze to use. No more hand-held pump to squeeze.
Charge it up with the USB charger or any standard USB charger.
Don't really need the three speeds, in my opinion, but if you want to speed things up, they are there.
Easy to pause the pumping by holding the start button until it stops, pausing the pumping until you want to add more pressure.
Holding the slow-down button will quickly release the air pressure.
Easy to put on and off, easy to clean.
The pump is less restrictive and can be used with one hand.

I've had no problem with its operation.
It goes on easily; the three-button control is easy to use.
The silicone sleeve is comfortable.
The charge lasts quite a long time.
The size gauge on the tube is hard to read, though, since it isn't painted on, just raised numbers and increments on the plastic tube.