Here's my experience thus far with the hana clone. I have a blue one on order with elev8vape since 5/24. Still waiting on it. My local store got their black ones in on 6/2 so I dropped by and snagged a black one. Vaped on it fine from 6/2 till the evening of 6/4 at which point, it fried itself. I had just popped on my Stillare dripper with a 0.6 ohm build. When I hit the fire button, it immediately said too hot. I unscrewed my atomizier and stuck it on my Sigelei 20w to start vaping on while my dna 30 clone "cooled" off. Just as I was about to take a vape I noticed an electrical burn smell and looked at the clone and there was a wisp of smoke coming from the usb port. I immediately removed the back plate and popped the battery out. The sony vtc4 battery was fine but the clone wasn't. The screen was fried and from what I could see shining a flashlight into the red see through cover on the inside, all the hot glue had melted and flowed around inside. On 6/5, I returned it to the local shop and they exchanged it for me without a problem. So far I have not had any issues out of the second one. Works fine with all my atomizers, including my Kanger Aerotank Mega. In talking about it with the shop owner I got my clone from, they stated mine was the third to come back. But mine was the only one that had fried. One, the screen had a flicker. No firing problems at all, just the screen flickered. The second one went into locked mode and would not come out. If I'm not mistaken, the shop had gotten 20 and out of 20, only three had a problem. Now, before you start going off about how high a failure rate that is (aprox 1 out of 6) let me explain that I used to work for a retail computer electronics store. So I can assure you 1 out of 6 having an issue is actually not that bad. Bet Chevy wishes they had as low a failure rate on their starter switches lol.