Pros Great sound, excellent bass response.
Quality materials, especially like the (EPDM sheathed?) lead/cordset.
Value for money.
Cons Audio response (esp. bass) suffers if the in-ear rubber molding is not making a good seal against your ear. Practice, and an ear shape which matches the supplied in-ear molding, will help you eliminate this. Problem not unique to this prod.
Summary Many higher priced headphones still use cheap PVC sheathed leads which will react over time in contact with oily skin, the result being an ever-stiffening lead which will eventually fail - NOT IN THE CASE OF THIS PRODUCT.