Pros: Got these headphones on sale for 20 bucks. Great quality and awesome sound. I have had several interchangeable ear buds, and usually they start to hurt after 1 hour of wear. The Pioneers stock interchangeable fits my ears perfectly and I can use them hours ends without any pain.
Cons: Could be better if they had a volume switch attached to the cord. I ride a gsxr and its an annoyance to get out my ipod and adjust he volume.
Pros: The sound from these is better than I hoped for...it is exceptional. Especially for all of us bass fans. I have used them in several devices and the sound is perfect for any genre of music. I am a long time audiophile and these fit perfectly in every way.
Summary: This really is a good product, especially for the price. I primarily use them for running and the music is crisp with a lot of range and never really had an issue with quality. I also wear them at work as i do busy work and they do an amazing job canceling out my annoying coworkers. They don't cost much, they sound great and seem durable, so i honestly don't see any reason to spend $100 for "better quality" ear buds.