Good sound, terrible build quality 
cable broke in 3 months; do not buy used or from a shady vendor
 
shure se215 better alternative for long lasting iem at 100$ or re400 if you want to risk cheap build for better sound
 
sound:
typical ba sound anemic bass but present with fast and detailed treble
mids sound okay... Female vocals sound good on this
responds to eq really good (boosting bass does not seem to ruin the entire fq range that much)

They have been updated...
old model had bad build quality and fell apart on me and then broke within a year
 
Sound is basically just a crappy sounding version of the ath m50 (this is not a bad thing)
it has more mid bass but it bleeds into the spectrum... 
not much extension but at this price point the sound is about as clean as it gets
 
the new model is a little pricey i believe at 20$ they were a steal (for a pair of headphones you could afford to toss around) but now i see them for 30-50$