I purchased a pair last week, I like the concept of the product as I love going "cordless" and have owned plenty of bluetooth / kleer headphones in the past but probably am overall a bit disappointed with the new Sony's
- Bought the 16gb, don't know why, should have got the 4gb at half the price, as although you can scroll ("click") playlists to then scroll individually click by click when looking for songs is a bit silly if you have 4000+ songs on it. I would normally only put podcasts or 100 to 200 songs on it and continually change / rotate, which is easy enough to do.
- External speakers are a bit gimmicky imho, sound not clear or loud enough to be worthwhile, would use JBL Flip for such a need.
- Comfort is fine, they are quite lightweight, much lighter than my Parrot Zik's. I couldn't see wearing them for an extended period to be an issue, not that I have tried that yet, max. 1 hr approx. so far.
- Most disappointing for me, and this is only my opinion is the sound, I find it a bit "bassy" and much prefer to wear the smaller Sony NWZ-W273, both for convenience, portability and sound quality in comparison. Of course both of these are not meant to replace or be compared to higher spec corded earphones, just the convenience / size of the 273's suits my needs at times.
Not a "bad" product, just wasn't quite as good as I had hoped.