Blundstones soles will disentegrate after a couple years, or in my case, five months. Exposure to water or dirt followed by a prolonged period of non-use will induce hydrolysis, which slowly deteriorates the sole. It will split and crumble as you walk, and ultimately you'll find your gait unstable - outside of their just being dangerous to wear at that point. The leather upper will survive fine, but you're paying upwards of $100 to find specialty cobblers who are able to resole Blundstones. The quality has really dropped and will continue to do so long as people believe two years of use at 200 dollars is fair.

Conversely, you find people who have had theirs for ten years and wear them daily. If you're buying them now, though, you're probably not getting quality.