Well this was my first time using a penis enlargment pump and I was amazed. After unboxing it I was happy that the unit was already assembled. I charged it for about a hour then decided to try it. Now for the wow factor, let's say I was very sceptical I myself am AVERAGE this device right out of the gate added an inch on low power. I plan on working myself up to full power in the next few month's. Definitely a must have if your a dude trying to gain a bit in the bedroom. You will love it and your partner will too.