Cons:Sound quality is OK for the price but not spectacular.
The sound quality is OK, given the price of these headphones. I paid roughly $17 online for them. However, I recommend spending more money for better headphones.
At normal volume levels these headphones sound quite good. At higher volume levels I heard some distortion, especially when playing songs with deep bass (with the bass boosted on my equalizer). Of course, most headphones will distort the sound if the volume is turned up too high, but in my opinion a great pair of headphones should have been able to handle the volume level that I was using.
As a point of reference I compared these headphones to an old cheap pair of Panasonic headphones that I've owned for ~15 years. I found that the Panasonic headphones could reproduce sound at higher volume levels before noticeably distorting.