No Matter how i insert them, what tips i use, what i do. They don't fit my ears. They either create under or overpressure in my left ear. Its hell of annoying. Sometimes they sit perfect, but only for like a few minutes.

This also causes the isolation to be not as good as it should.

I replaced the used tips with new ones and also add spare tips (all official from Sony).

Product comes in the box with bill and does have full (japanese) warranty.