I just bought a pair of these to replace my old Bose in-ear headphones.
Overall, the sound is very nice, better bass than Bose and clear sound. However, the treble may be a little harsh on my opinion and also they lack some bass for non-bassy tracks (i.e. metal, classick rock, etc. would sound much as they are played over a tweeter. Though, it sounds great on Hip-Hop and the like).
No microphonics or other annoying effects so far.
What really is a mistery for me is why on earth Sony provides a cord-length adjusting accessory which was obviously not considered when the cool-looking bulky case was designed.
I prefer the strap bags provided with other models as anything would fit in there without a need for a fancy wrap.
What I ended up doing is throwing away the headphone “base” within and use the case most like a general-purpose carrying case.