This is awesome! A lot of the other remixes of the song are so heavily overdone with dubstep. There is a beauty in simplicity, and this is a lot more listenable because of its simplicity.
I don't know how to describe it exactly, because 'genuine' doesn't sound quite right, but there's something about that piano/keyboard bit I really like. I like to refer to a lot of songs as more personal versus synthetic, and this feels more personal, which is always really good.