Pros: Stay in my ears, durable.
Cons: BOOM BOOM BOOM, Bass EVERYWHERE!
To be fair, if your favorite break on the way to the gym (exactly what happened to me) and you need something to hold you over, for $15 these are just fine.
If you in fact like music to sound good, these are the wrong choice.
They do stay in my ears well. They look ok I guess, not a hard ear bud guy but whatever.
For the sound think standard iPod headphone "Bass Edition".
They sound good if only one thing is happening, if you want a low note and a high note prepare for audio diarrhea. The bass is just all over the place, a few songs sound ok and electronic music , and newer gen metal sound pretty good but everything else sounds pretty rough. Apocalyptica, "Metallica on 4 Cello's" is an exception. The songs are very simple and very bass oriented.
Anyways they are pretty good work out headphones if you like to have bass driving you, the bass actually helped me work out harder but my ears were very fatigued afterwards.
If you want value, I would say these are ok but Koss earhooks are a way better option.