The medium was already installed and, for me, it was a bit uncomfortable after just a few minutes.

For me, it did begin to be a bit uncomfortable after a while, but less than the medium earbud and nothing that would make me want to return this and get something different.

It was a bit difficult to put the new earbud on, but it helped when I put my thumb against the earbud and pulled it up over the earpiece.2.

The plastic round ear plate bothered my ear a little bit but only after awhile

Fantastic!I am so happy about finally finding an earpiece that fits in my ear so well