Took me longer than anticipated, in part due to a simple lack of time. Another task was finding the correct tips, which proved to be more complicated than in other cases. Problem was not that not enough tips were included, but that more than one set felt ok in the sense that they stayed in my ears and sounded OK as long as I tried them out at home. On the go something sounded off... in the end the tips simply did not fit. They did not fall out though -- they are just too small and don't stick out far enough to fall down. After going through 3 of the 4 provided silicone tips I'm happy now: fit is fine and sound as well.
After a bit of an initial disappointment I have to say I like them quite a bit now. While I hear a slight bump in the upper bass which I'd prefer to be a bit less kicking, it reaches deep, staying clear and giving that nice feeling of a slight rumble. Not overdone, but there if the music calls for it, giving it an impressively dynamic representation. Voices are rendered beautifully, very smooth without sibilance. Its quite spacious and very detailed, still I'd like a bit more sparkle in the treble. Positions seem pinpointed and stable.
I listened to them for several days using my iPhone 6s, mostly on the street or in the underground, isolation is quite good (maybe not as good as with the Shure SE846). Pairing with the ifi iDSD Micro seems very good, bringing out even better dynamics (Eco mode and High Sensitivity setting). The T8iE is very sensitive and I use a lower volume setting than with the Shure or the K3003.
There are 5 sets of the oval silicone tips included (one set installed, 4 in the box), from very small to quite big. I did not try the Comply tips that are included as well.
The in-ears themselves are incredibly small and compact. Hard to believe that theres quite a big dynamic driver inside... No, I did not take mine apart, the second photo is from IFA where Beyerdynamic had some parts available for photos.
Left/Right markers are on the inner side and quite big, i.e. good to read.
Connectors are the same as on the Shure SE846, so the Shure cable with mic works. But the connectors on the cable are bent too much for a comfortable fit in the ear. Very unfortunate as I'm really missing a mic/remote on these for use on the go.