So let me start by saying that I have been vaping for close to 3 years now. I started with a tiny 510 battery and carto. Then I found the kanger t3 or whatever it's called. It was ok, never great. Then moved on to the evod which I loved. Then I moved to the protank 2 (I believe all of these tanks came out in like the same year). So the protank 2 is where everything went downhill. At that point about 1/3 kanger coil heads would even work, most shorted right away or tasted gross. Then I went to the aerotank, thinking they actually changed something "new design" "new coil" yeah right!!!! What we need to realize is this company is releasing like 5 new tanks a year and it's not new!!!!! It's the same old kanger crap with new colors and shape. Their coils even on a good day just seem harSh and tough on the throat. Soooo in between all that junk kanger crap and 200$ later, I decided on carto tanks and a nimbus rda. Wow all that wasted time on kanger products. And the new aerotank mega and mini? It's a joke and probably works about the same as anything the make..... Not well. Idk just my opinion I suppose. But I personally won't be buying any thing they make until they actually redesign it and stop raising the price for essentially the same working piece.