Pros: Relatively good sub-bass, improves with use, surprisingly durable
Cons: Veiled and muddy mids and treble, pads get very dirty easily
For people who like bass, it has a good but not overpowering quantity, but can lack in clarity and quality. However, it has a relatively good sub-bass for headphones within the price range. The upper mids / lower treble is very quiet. The treble is very veiled, which makes it difficult to cut through the bass. The audio is overall very muddy, and so these headphones would not be ideal for classical music, or music where the tone and timbre of the treble is highly important. Burn-in improved the sound quality and bass, but not enough to change those characteristics. I've heard removing the cover to expose the drivers better helps with the veiled sound, but I haven't tried it to know.
Comfort and Durability
These headphones are made of cheap plastic, not designed to be sturdy or long-lasting. They are lightweight and portable because of the plastic and on-ear design. The moving heads and adjustable height fits well enough, but the headphones were pretty tight at first. After being worn for a while, it no longer feels tight nor loose as the plastic bent and stretched. The ear pads are not uncomfortable, though they get dirty easily. These headphones can be worn for a few hours after being stretched without hurting much at all, no more than any other on-ear headphone.
The headphones proved to be surprisingly durable. The cheap plastic does not crack, can be bent pretty far, and numerous hard yanks on the cable has not caused any problems (even when hard enough to break an audio port on my computer). The input jack end of the cable can be shorted out easily (and fixed with enough tape) if bent wrong, but hasn't been a problem with my repeated yanking.
For people who want cheap headphones with good bass, these don't have the best quality but can be considered for listeners with a tight budget. These headphones can easily be picked up for $15