Pros: Sound, looks, metal build, value
Cons: A bit chunky in the ear
At $30 that I paid for them, these IEMs are unbeatable. You would have to spend much more to get better sound. I prefer these than the Klipsch S4 it replaced, which had harsh high's and muddy low's in comparison and they broke without being abused. So what's so go good about the V-Moda Bass Freq Metal earphones? A lot!
Sound quality is superb, with good overall frequency response and clarity; they're fine to me without any EQ. Good and detailed mid's to high's, and the bass is fairly accurate. Furthermore, the sound is not fatiguing at all.
The build quality seems good with metal casings. I also like the design aesthetics of the earphones although they can feel chunky at times. That said, I find them comfortable enough with good fit (medium silicones are perfect for my ears) and can use them all day at work.
I have the single-button Android version and works well with my phone. They also make a 3-button iPhone/Pod version too. When making calls, I haven't heard any complaints from the people I talk to, so the mic must be ok.
Anyway, they're good earphones, so buy them. I bought 2 pairs.
===== Update 2014/01/02 =====
Unfortunately, I can't seem to comment below. Anyway, I can assure you, 'Aero Dynamik', that I'm a real person who bought these phones and yes, that is my face. Just never had the reason to register before. I didn't talk about myself but I did compare it to the Klipsch S4 that I own and is now broken, which I find not as good as these pair. I suppose I should also mention my other gear that are relevant, which may describe the type of user I am:
MEElectronics Sport-Fi M6 that are very fiddly with placement
Logitech F540 that I use for gaming
Panasonic RP-HC500 that I used to use when I go on business trips
Audio-Technica ATH-ANC7B that replaced the Panasonic
and a pair of Sennheiser RS160 that I barely use but I find very comfy.
Anyway, I'll eventually review some of the above as well at some point. FYI, I bought 2 of the V-Moda's because I lost the first one.