For their price range they have pretty good quality sound. Much better than my cheap Sony set. I'm not too fond of the thin foam cushions on the Porta-Pro's...I've worn out about 4 pair of those cushions so far. And I'd like a slightly longer cable, but that might not be a concern for you.
They look a bit funky, but once you get used to them, they are really quite comfortable. But they are definitely portables...not a substitute for studio headphones.
As with all headphones, you really need to try them out before buying. Very subjective type of equipment, with personal tastes varying widely.