Very easy exchange. For cheap little slippers these are great. To my delight, these well-below-$50 headphones sound almost identical to my Sony headphones with the 3. Lo estuve probando al realizar llamadas y se escucha fuerte y claro, sin interrupciones. Id buy this bicycle cell phone mount again. I bought this belt after reading the reviews and my need to upgrade my weight lifting belt after using a velcro one for a year. The strap was too tight. However, aside from the over-barring midrange and lack of highs, the lows are quite good. Im sure theyll loosen up with time. Worked great for me.