Pros: variable bass, detachable cable
Cons: isolation, carry case
IE80 has a warm sound overall,crisp high and punchy bass. The "bass knob" was the best part for me since I am not a basshead so I only turn the knob to halfway. many people said the main issue was isolation but it really depends on where u used it, for me the isolation was enough in train and buses(maybe I dont like total isolation).
To me the carrying case seems to be too big for IEMs