Pros: Sound and build quality
Cons: Mids are recessed
For the right price these are worth it. At 80-100$ they're a good buy. At MSRP of 150$ I would pass.
Excellent bass extension; play well out of mp3 players as well as amps; very detailed and "fun" sounding. Lacking in the midrange for vocals personally. Great for bassheads, neutral fans look elsewhere.
A good cheap substitute for these would be the Panasonic HTF600, performing at close to 90% the same sound quality @ 30$