i am really enjoying it. it's super easy to link a music folder from my external hard drive on my desktop to sonos. the only bummer is my desktop has to be on to have access to the files. i'd say i have about 3/4 of a terabyte linked. there's a 65,000 song limit, so i wasn't able to link everything, but that's fine.
i have the player on my phone and on my desktop. i was afraid of how the player would handle an extreme amount of music files, but it's super user friendly.
for the way i have my music organized and the way my house is set up, it is absolutely exactly what i needed.