I purchased a cana clone from 101vape few weeks ago. After using it for about 30 minutes the screen went out, still fired though. I took the battery out for a hour, put it back in, and there was a bunch of scrambled dots then blanked out again. I emailed customer support and told them the problem, in a couple hours I got a response saying they were sorry and they sent me a new email with a pre paid return label to printout and use for the return. I was expecting that I would have to pay shipping since thats what their return policy said, so the prepaid label was real nice. That prepaid label had a tracking number. After the tracking said they had recieved it, I waited for a couple days and emailed them and asked for their answer what was going to happen, they sent me email saying takes a few days after delivery for them to process. I waited 2 more days and sent another more stern email saying it's been 5 days since delivered to them and I wanted to know what they were going to do? Customer sent me email saying that they didn't have the bad unit that I sent them but since I used their label, and it said it was delivered to them they would send me new one that day. They did and I got the newer version, so long story, they made the issue fixed. I was happy and have no problems with them and would feel good using them again.