I tend to be really easy on my equipment. I have a provari v1 I got in dec 2011 still works, but those are build like a mech. I also have a dna30 clone box mod I got in July of 2014. And a Smok xpro m50/65 I got a few weeks ago. All still work as new. I did have a Chinese tube mod I used for a while that I did break. No visible signs of breakage, but I dropped it and it just wouldn't turn on. ~$40 and I used it for a few months, so yea some are cheap and delicate.