The W4S MS 2 showed up at my door this Wednesday. The wait was well worth it. I could not be happier with the quality of the sound in my system and the incredible ease of use.
I have not had a better digital source in my system (Oppo BDP 95, Mac with Pure Music/BitPerfect/Audirvana/Decibel... and legacy CD and DVD players). For context: W4S DAC2, EE DAC Plus, Audio Research LS2B, Krell KSA 250, Apogee Caliper, REL Stadium 2, Violectric V200, Eddie Current S7, Grado HP2, Audeze LCD 2.
Getting the music onto the server's hard drive was as simple as described on their website (drag and drop). I opted to activate BLISS to clean up the library copied across. Feeding a CD (label DOWN) launches the auto-rip. Five to ten minutes later, FLAC files will be on the hard drive. Interaction with the server can be via webbrowser or the mobile device applications, as described. Everything works smoothly.
I opted to install Crashplan to handle the backup. It is connected to my NAS and CrashplanCentral (allow 5% CPU time, scheduled backup 1am to 6am). Set it and forget it.
Congratulations to EJ and his team!