I like the Motorola ROKR S9 head phones although it's lack of full bass frequency but it's acceptable.Pros -- look super cool, very light and no WIRE.- sound good and love the controls on both sides- pair up easily with my Motorola KRZR K1.cons-- rubber covers only have 2 sizes. lack of the smaller sizes.- uncomfortable after wearing for over 2 hours.- It cuts off often and re-connect pretty fast.- the handsfree phone conversation only have the left ear piece enable.- the controls only works with the "Sound" function within the Motorola KRZR K1 "Media" menu, and HAVE to create a playlist in order to play continuously, otherwise it will stop after 1 track, If using the Moto audio player it won't allow you to control the play/pause or track up/down. The ROKR S9 manual doesn't explain.Conclusion: I like it, it's easy to use...prior. It's on the expensive side for a BT headphone + handsfree function, but the convenience worth $$$ spent. I recommended.