Sorry if I'm digging up some old threads here, I know a lot of people just absolutely abhor that stuff.
I bought one of these at a B&M store and so far, it's been working quite well for me. The only issues I've had thus far are this:
The spring on the battery bottom came off and they just replaced the battery bottom for me, no charge.
The glass in the front screen came out and they sent it in for repair and gave me a loaner. They have someone in house I beleive that does repairs and he has a pretty good success rate from what they tell me. I'll leave it to when I get it back to see.
Other then that, it vapes like a champ for what I paid for it, and I haven't had any issues with buttons or anything else. Yes, the firing button is off-center and that will KILL some people with problems with perfections, but what the hey, I like it and the tanks that I bought for it match it perfectly (What can I say, I'm a sucker for looks).
If you can pick one of these up on the cheap, go for it. IT's a nice mod and it works well.