I have to say, my first ego-t was a knockoff that I bought at a smoke shop here in Town. It was OK. I broke the head off of it in my pocket yesterday and I had to replace it. I had to go to Kansas City where there are a few Vape shops and I bought a genuine Joyetech Ego-T Upgrade. There is no comparison between the quality of the two. The Joyetech just seems better built. The threads are much smoother and my vape seems to me is more consistent. The knockoff, after charging started off a little harsh, then was reallly tasty for a while but then got week. The Joyetech battery does not seem to do that. I have ordered a VV/VW Innokin Itaste 3.0 to be my main but this will be a great backup.