Stuck this on my NAS again at the weekend with the aim of seeing how it ran on the Xbox One
I bought a premium pass as I thought this was required, found out they made it free from the Xbox One on 16th December afterwards
Among some of the extra stuff you get with the premium is a superior music tagging service, so I set it off against a 1TB collection that was reasonable well tagged that I got off a guy a work. It took about 2 days to do it all, then I added my own stuff in. Another day doing that, I had to reboot the NAS as the CPU and RAM got stuck at 100%.
Now I have 150,000 tracks and I would say 90% of artwork and information was there first time, the errors are mostly classical music albums and other completions.
Next job is duplicate removal which I would estimate at 20% or more