Summary: Terrible, waste of money. The cord system is a joke that was clearly never tested on real humans before being released as a cynical moneymaking ploy (knowing that it is nearly impossible for people to try these on before buying). They are awkward to put on (and look stupid when on). Most importantly, they just do not stay in your ears even when you are standing still, let alone moving.
Summary: I bought these last week and I am back on the site looking at purchasing new headphones! No bass at all in music and podcasts sound hollow. I use them on my ride to work and I think I may have used them for the last time. I think they are getting packed in my carry on suitcase so I have something to use on an airplane.
Summary: The idea seems simple enough: pull the latex-type cord to hold them onto your ears while exercising or doing "sports" (considering they label themselves as "Sports Headphones"). I'd tried various versions of these "ear grip" sports headphones in 2013 with no luck as I was struggling to get a proper set of over-the-head sports headphones. I'd tried the Yurbuds, other Sony "ear grip" versions and similar from Seinnheiser.
Summary: It doesn't feel cheap, that's for sure. Then again, Sony spent too much time in the design and not so much time in the quality. The cord is really flimsy, would have preferred something a bit thicker and durable. The sound quality feels kinda weird as the speakers are super tiny. However, it doesn't cancel out noise completely, which is good for running outdoors and having an environmental awareness.
Summary: I have to admit these look pretty sick! I mean, it's not like your usual set of earphones, but there are a few things I think could be better. It really needs a thicker cord, it just feels too fragile right now. The earphone tips sizes don't really have an effect on how well they stick in your ears. They barely fit, can't get them to go in snuggly. Too much of the "on-ear" relies on the "ear-loop" instead of the rubber tips. Finally, the sound. It feels very compressed.
Summary: The sound quality is very poor. Tinny and thin. On the plus side, they don't fall off when I run which is why I bought them. After 3 years of nearly daily use, my Sennheisers gave up. Wish I'd spent the extra $ and just replaced them. Way better sound.