Pros: Indestructible; acceptable sound
Cons: Uncomfortable; unwieldy cable
I don't think there's much point in going particularly in-depth here, as there isn't much to say about these. The sound quality, while okay considering how cheap they are, is nothing to write home about - quite dark and rather muffled, boomy as one would expect closed headphones to be, and pretty laid back, and the resolution is not much more than "acceptable".
The reason I like these is simply their awesome utilitarianism. The cable is flimsy and absurdly long, but the headphones themselves are pretty much indestructible, so these are the cans I grab and toss in my bag when I'm off to the coffee shop or the library.