The Kreisler set is the favorite so far. I had some of this stuff in the ' 60s and '70s on German lps. I could never catch up to the Japanese lp reissues of the Beethoven sonatas. This package answers many old wishes.
The Heifitz is dandy as well.
The Bruno Walter is a decent start but they need to do a second box with his Beethoven, Brahms, Schubert, Haydn, Berlioz, etc.
I am dreaming of a Szigeti bundle.
Much of the other material is already in my collection so I have not purchased the Schnabel, Fischer and many other sets. Some of the artists are not of interest for me but it is nice to have the opportunity.