Pros: Golden looks, flat-cable, cable case, a pack of ear-pieces
Cons: Lack of bass, harsh mid-high, almost ess in female vocal songs, aggressive lead guitar.
As list in the summary, I don't like this product, and I will not buy any product from Philips because of the post-sale service.
After I tried replacing all of the ear-pieces in the box, I finally confirm that the sound quality of S2 is bad.
First of all, I could not hear any bass instrument in most of music. It's less even than V-Sonic VS1D.
And the High-Mid is boosted too much. The sibilance of female voices is very noisy. Listen to J-Pop is in hell.
The over boosted High-mids also make electronic guitar aggressive, thus the Solo part of E-Guitar is also in hell.
I finally buy JVC FX-850 as my only IEM now, and S2 is sealed in the drawer for 1 year, or forever. Just because of the bad post-sale service.
Never S2, Never Philips!