I bought these initially for the mic section (earphone section can be detached from the mic section) so that I can use them with other iems for my smart phone. The phone adapter can be purchased from Shure for $50, so $10 extra seemed like a good deal to pick up an extra pair of earphones. The build quality is nice, cables are a little wide and stiff but appears to offer sturdy, tough performance. Now here's the surprise. Based on many reviews, these iems have been condemned to having poor bass, "anemic" as some as described. However, after a regimen of over 100 hours of burn-in using a combination of pink noise, white noise and stepped frequency treatment, and finding the right plugs to seal a good fit in the ears, I have found the bass to be only a bit less than my Sw-Xcapes which, though they are not bass-heavy, they do produce so very nice low, tight bass notes.