I've been watching this thread and I should chime in!
Korkers are bomb proof, and pretty much the only modern boots I'll buy now. I've had my pair of Devil's Canyon's a full year now (and I bought them used). Have put a tonne of miles on them, and have had to buy replacement felts once already due to the number of miles on them. Easily 100+ trips on them already. Hardly any wear at all, besides a tiny bit on the neoprene that isn't notice-able.
A couple notes I do have though.
Someone had mentioned worrying about wrecking the inside toe of the front of the boot. Apparently I do the same thing, and I did end up ripping the rubber front of the boot up, which caused the bottom to pop out of the front constantly. I ended up super gluing it back together and haven't had problems since.
I had a few other pairs of earlier korkers. I did have problems with the soles popping off and the back nub getting broken off. Both issues seem to be fixed with the newer pairs - Kitty and I have not had a sole pop out or anything break on our two newest sets.
I'll second the no liking Boa's. This was the first time I had tried them, and I'd never get them again. I don't like how it tightens up (I like my boots tight, and Boa's just don't seem to sinch down the way I'd like, especially mid foot. I also don't like them in the winter. When you've been fishing a full day in negative temps without gloves (like I often do), it's damn near impossible to pop that button at the end of the day lol! I've had to delay taking my waders off a few times until I've been home to use my hands again!