Regarding Mosaic, as well as some other reissue companies, I tend to agree with o10. I have a few of the Mosaic LP box sets and I typically don't enjoy hearing 2-3 takes of one song in succession. That may be OK for one listen to pick out the differences. But for repeated listening over time I don't care for it. For me it would have been better if the original recording was presented in sequence, then offer any worthwhile outtakes at the end. But that is just one person's opinion.
Otherwise, I've found the Mosaic sets highly recommendable.
One other related point. For many artists, regardless of type of music, I'm content with one or two representative recordings. It is only artists I really enjoy that I've accumulated from maybe 5 to 25 or more albums. That preference limits my interest in most of the Mosaic catalog. I'm not a completist. ;^)
Otherwise, I've found the Mosaic sets highly recommendable.
One other related point. For many artists, regardless of type of music, I'm content with one or two representative recordings. It is only artists I really enjoy that I've accumulated from maybe 5 to 25 or more albums. That preference limits my interest in most of the Mosaic catalog. I'm not a completist. ;^)