To me, the way some people feel the Ego twist is a game changer...I fell that way about this device. It does what the E-go twist does except has some extra features, higher voltage range, Mirrored screen, "Suggested Voltage", great battery life. The one thing I passed back to innokin was the plug it takes. It's one of those nokia style plugs that are difficult to keep plugged in. It doesn't really snap in there, so you have to be careful to make sure the plug is engaged when plugged into the device. PLEASE subscribe to me on youtube! I have a contest coming up for my 500th subscriber!