Too early to post impressions! Also, I am no audiophile, dont understand much terms and still listen to mp3s (other than the few flacs that I have). I do enjoy music very much though.
The sound is very clear, unlike most bassy earphones, these have very good mids and highs too. The bass is deep and solid, pretty nice, though not as tight as I would like, a little bloated because of the sub bass.
That is all I can say as of now.
@Black_Hawk I know youve got the XB90! So whenever you plan to sell them, you know who to ask!