Conclusion: Skullcandy's iPhone FMJ earphones are on the lower end of the earbud-upgrade spectrum in terms of price and overall quality, but they work well with the iPhone and deliver respectable audio that doesn't distort at higher volumes.
Pros: Affordable. Works with iPhone for answering and placing calls. A big step up from Apple's bundled earbuds. Blocks out some outside noise.
Cons: Audio quality is adequate but by no means excellent. Skull-embazoned design isn't for everyone.