I have been using this mod regularly for awhile now and it does have much of the same quirks that are mentioned in this thread. Overall though the device is dependable and rugged enough for my work device. I am pretty sure I have a v1 and if it bites the bullet sometime I will probably buy another just because I deal with paint, drywall, carpentry, and power washing and it is a mod I do not worry about being careful with at work.
Those are the same reasons I like mine, plus the very consistent vape. It is built like a tnk and I clean it by running it under the faucet. Just spent the afternoon, outside, cutting a tree down, cutting it up and cleaning the whole mess up. The Invader was with me the whole time. Yeah, I have other modes that I could have used, but I don't have to worry about the Invader, other than the tank. That top cap is the greatest, everything can be made solid with no problem. I'd love to convert a few of my other mods t that style cap/510 connector!