The automatic function is a major plus, making it easy to use and more convenient than manual pumps. The controls are straightforward, and the suction levels give just the right amount of customization for comfort and effectiveness. The pump seems durable, and the materials feel comfortable against the skin, even during longer sessions. My critique would be the noise level—it’s a bit louder than expected, so it’s not the most discreet option if privacy is a concern and it his huge so hiding it may pose a problem to some.

Overall the pump is well made, the internal length is just over 8 inches. The battery life is good and charging is quick. In manul mode you can choose a pressure of -25, -35, -40, or -50kpa, the pump will then automatically stay at the pressure setting. In auto mode the pump does 3 sets of suctions in a row and holds the pressure for 1 minute before releasing and starting again. The problem is that it doesn't regulate the pressure and instead it pulls a set volume of air out of the chamber. The larger the penis the less air there is to pull so this results in dangerously low vacuum pressure. For me this setting goes beyond the -60kpa that the device will read and is potentially dangerous for larger chaps.