After a couple of weeks with my TDIII V2 I have to say that I am not a fan. Don't get me wrong there is nothing bad its just their sonic profile does not do it for me (even though a U-curve normally does being an Ultrasone fan).
Perhaps its my bass related musical tastes, there is sub bass but its not that controlled and has impact but cold, mids seem to be hidden and the balance just seems off. EQ does not seem to help the lack of mid bass either.
The treble however is decent, nicely bright and detailed which I think is one of the TDIII strengths.
I find myself leaving these IEMs on the shelf and go back to my Brainwavs M2, If the M2s had the housing and build quality of the TDIII that would be awesome as I love the TDIII lightness and cable finish.