Five stars because it's so cheap, sounds great and has decent documentation. I bought it for Qobuz support and as a dlna endpoint for a RPI3b/Digione platform. The light weight system runs good on that tiny sys. Runs Qobuz well, a good solution while Qobuz's own app doesn't support upnp/dna. It isn't clear what we get in terms of music info with the upgraded version - more info on that would be better marketing. For local library, I can feed it from Media Center running on Win10 or it will pull from MC's dlna library, but the sorting or searching isn't so great as with MC itself. I guess this is a common limitation, but it would be great if it built a more complete database from the metadata. But then it has to run on a tiny sys, so better not to stress the RPI. I haven't used a NAS/USB direct connected collection, so can't comment on that option. Requires Software mixer be enabled for this I2S hat or else silence. Although there is probably no resampling for 100% volume, I'd rather not have a mixer at all. Help with that, please. Would be nice to have sys monitor app, but again, overhead! All in all so far a great platform for Qobuz/dlna/upnp.