Just got these today as well. I’ve only listened to them for maybe half an hour, but they sound very nice. I’ve never owned in-ear type earphones before, so I’m rather surprised by how much better it can sound. I’m sure it has to do with the quality of the earphones themselves too, but the detail that you can hear — when all the external noise has been removed — is amazing. Then again, I missed three phone calls during my short listening session. I guess I have to be careful.
Bass response seems pretty good, though I guess this is supposed to improve after breaking them in. I also haven’t tried the various fitting mechanisms. The default choice seems to work alright.