The Chuck is one tough-... mod. I have 6 off them in my house... which is totally ridiculous I know. My oldest Chuck has been through hell and back and still works like the day I bought it.
The button is the weakest link though, once almost burned my leg off while it was in my pocket... I was a little tipsy so I didn't notice until I reached in there to vape and it was hot hot hot. Damn hot... like... really really hot...
Still works like a charm though.
For a while they had sat on my shelf, as I was messing with other mods, but now that I finally found an AFS that works, I've been happily vaping my Durachuck. Nice to be able to use them again without dripping.
My best advice for anyone on the fence about owning a Chuck: