Pros Amazing solid and crisp bass, awesome sound quality in all volumes, nice cord features, good sound isolation and fit.
Cons mute button drags on left earbud, can be fixed with creativity.
Summary While researching these headphones i noticed they did not score very good ratings but i bought them anyways, as they were Koss's best earbuds and you can't go wrong with Koss's lifetime guarantee. Overall these headphones are amazing! The sound is comparable to the Bose in ear phones with more bass attack. The bass about brought me to my knees my first listen.. Stellar! They have the perfect amount of bass, (after bass boost EQ), and balanced nicely. The short cord for sport bands is also a nice feature, and the mute button is convenient, though you can't hear to well even with no music playing due to the superb noise isolation provided. These are a MUST for all music lovers, being cheaper and better than most 100 dollar phones (these are $62 bucks) and are definitely a 300% upgrade from iPod headphones or any other free with mp3 player phones out there. -Amazing bass, very loud and soft range, nice features, and lifetime guarantee. Get Some!