As far as I've read the reviews, S9 $ big time!
Its audio quality was ultra cr@p! No bass, nothing.
And most of em had issues with the user sweating! most ppl used to exercise wearing them and once their sweat got inside, the device went kaput!
Also most ppl reported that to listen to music w/o skips, they had to keep their phones in their shirt pockets as it had very less range!
As
Ad1tya prefers sound quality, S9 aren't even close to delivering them decently!
imo, it was a really cool design but cr@ppy engineering and poor implementation spoiled the product's market!