I have the Fiio X3 II for a while now, RMA'ed it once while still under warranty....replacement unit has been solid though. I don't use it as often as before, I use it together with either a JDS Labs C5 or a BL-2 Tube amp, and I have to say, it the most versatile DAP I've ever used. Can even play ISO files, something my HFM HM-901s can't do. I use my LG G6 + Spotify Premium now mostly, Spotify for sheer variety of songs, but I do fall back on either my HM-901s or Fiio when I go on vacation or when I was to lose myself in some DSD goodness.