I just got mine in the mail today and put a .27 build in my ehpro big bear and put it on there. The coils took forever to warm up and by the time I could get a a couple vape off it the button was too hot to press. The button looks tarnished on arrival, I'll post a pic later if anyone wants to know what I mean by that but the hits were so weak and I started poking around. I noticed the left battery was loose in the mod and the only batteries I had that would sit in there well without wobbling around were my HGs that are reserved for my hexohm. My Sony's would wobble in the left battery position (the one that's not spring loaded from the bottom). After getting really really weak hits for awhile and getting more and more of a hot button issue I decided to throw on my twisted rda that had a .13 dual fused n80 build just to see the difference and the button got wayyy to hot within the first second or two of use and I just had to put it down as it was a little frustrating. I will probably take the whole thing apart in the morning to visually check the contact but my first evening with it, first impressions are that it's generally unusable. It's heavy which i like, it's clean, it's button is in a spot I thought I would like but after use I don't. The edges are softer than my snowman and so they don't hurt my hand but the stiff throw and position of the switch make you torque your hand at an odd angle. I loved it on sight, hated it on use. That hot button just kills it