Got my Walnut about a week ago, spent the first weekend listening with Zen V1 and thought that was all I needed. Came to work and decided to try RE-00 and found that this is my new carry everywhere setup. I don't know if it is just my ears but I feel there is a synergy there that just works for me. I am very happy with this $60 total package. Thank you so much for this find! BTW SD card that came with it would not allow me to add music but the music already stored there was fine. I copied the tracks down, reformatted with SD Formatter and was then able to add my own tracks to it. Also threw in my 64GB card from my Pono just to see if it would work, no problems at all. Skipped right over the tracks it couldn't read and played everything else.