I got one of these mods when released. Great for about a day. Then I noticed my coil was sizzling after I took a hit. The 10 second warning message was displayed. I thought nothing of it and continued to vape. Within two days, it was impossible to use without it sticking. RMA’d it thinking that Lost Vape wouldn’t have a bum release. The replacement arrived after a few days. It didn’t take 30 minutes before it was sticking. I returned it for a refund. I’ve seen many people with the sticking fire button issue, both on customer reviews and on various forums. Most have been told, like I was, the stickiness will work it’s way out after about 30 days. Since that is usually past the refund time, I don’t think I’d risk it. This is otherwise a nice mod, at least for the very short time I used one.