I guess it goes all the way back to Ambient #1 : Music for Airports, the piano is a perfect instrument for the contemplative, ambient music in the mixes found here. This mix is devoted to the ambient piano.
I was happy to squeeze in two tracks related to Harry Towel, the man behind the brilliant net label Audio Gourmet - http://music.audiogourmet.co.uk/. The first by Talvihorros is from the 2011 Audio Gourmet release "Just a Moment" which you can find here... http://music.audiogourmet.co.uk/album/just-a-moment. The other cut is from Harry's recording artist guise, Spheruleus. You can find that one here... http://tessellaterecordings.bandcamp.com/album/cyanometry. You can find some of Harry's excellent mixes here on Mixcloud http://www.mixcloud.com/spheruleus/ and here http://www.mixcloud.com/Groundingsounds/
As always this mix can be downloaded here... http://lowlightmixes.blogspot.com/