It's NICE! Wow!.......but check this out....... I have 4 old attys that I don't use because they are way too weak. No red glow, just barely sizzles, little to no vapor....so I get the V2...(charged the batteries first per instructions)....put on an old crappy atty, and I get an INSTANT red glow and LOTS of vapor! I was almost ready to throw those 4 attys away. I couldn't believe it...The unit is very solid. My only concern is when you screw the atty on, you can't screw it to tight or it will short it out. I'm afraid I'm going to accidentally, when pulling the cart on/off to top off/refill and put back on, I am going to do this. I will have to be extremely cautious with this...I'm not sure what puresmoker means by (too tight)....Otherwise it's GREAT! Just wanted to share