I will be going through the manual page by page tomorrow and doing performing all the steps it describes. That to me is the only way to provide a fair and honest answer to questions.
I do not use registrations and never have but I have many that I downloaded and will give them a go.
I have also never used the Yamaha Music Finder - I simply setup my gigs with songstyles located in folders such as 1940s etc..
I'll try tomorrow to get to these things and post my findings.
As for sound - so far I have not gotten far enough into it to comment.
Deane