They sound great and they personally fit great for my ears. Although the XM4 are made from plastic, the build quality on this is amazing, and I expect them to last. My first day using the sweat shaper so far so good took off the sweat shaper as soon as I completed a one hour and 30 minute high intensity workout I was drenched in every single spot on my body and my clothes. Super cool and looks great on my remote! I love ?? these mules by Jessica Simpson and the price is right! We?re happy with the quality. I?m so disappointed in Apple for this keyboard case. Love the clip and the look of the sandal. I can wear them for hours. This worked out fairly well.