Okay...first off, I got the kGo VV last Friday. It is NOT the same size as the 1000 mAh eGo Twist...it's smaller...more sleek. Personally, I find the button very nice. I have regular kGos too...and this button is better. I don't mind the 650 mAh at all, as I like a smaller unit, and also I'm always near a USB or an electric outlet. It doesn't bother me about the mAh at all...I rarely am ever in a place where I can't plug up one way or another. That out of the way...sadly I cannot comment on how the kGo VV performs as the one I got was DOA. Brent sent out a replacement right away, but with the holiday getting in the way it isn't here yet. I hope it will be by tomorrow...or certainly by Friday. Naturally I was heartbroken to be one of the first to order...and was the unlucky one who got the dud. But things happen withe even the best manufacturers (SLB) and best vendors (Hoosier e-Cig Supply) Brent was really cool about it and is making things right.