Man it hits hard. Same as the Heavy hitter and the Keen or any expensive mechs out there. Vaping Bogan also included this mech in his top favorite mech mod list! I can see why. Smooth threading. Build quality is up there with so many higher priced mechs. Inside is nicely insulated for an extra bit of safety which is really good. I wish all mechs had this. The switch is my favorite part of this mod. Nice, clicky feel to it. There is a way to install a spring in it if you want. Saw it on a YouTube channel. Feels so nice in the hand. I bought the black version. It looks so damn sexy! Compatible with 21700 batteries. 18650 adapter also included. I'm using mine with an 18650 Molicel P26a on a 0.16 dual coil Alien build. Best to use a Samsung 30T. I'd highly recommend this mech. Thank you Vaping101.