I recently purchased the Sennheiser IE80 IEM’s and I am delighted I did.
The sound stage from these is amazing and open up my music in ways I didn’t think were possible.
It really has added to the enjoyment of all of my music and has quickly become my preferred way to listen to my entire audio library. I was concerned about comfort with extended use, but I have to say that it really is not a problem and I can forget they are even in my ears and just concentrate on the music.
The sound isolation while not perfect is more than acceptable and could probably be improved with the choice of a different ear tips. All up I am happy to recommend these to anyone who wants to really enjoy most types of music in complete comfort.