I agree with the precedent review, but I would ostensibly like to improve the vote from 4 to 5 stars.
First of all: not only violin historians are interested by this issue: let listen to the Hungarian Dance at the end of the CD, and you will find a tone which more than Heifetzian: it moves everyone.
The violin sonatas are accompanied by Loessier who was a great Swiss pianist, emigrated to the USA and the founder of yhe International Piano Library at the Maryland University: you can listen to him difficultly, but difficultly these sonatas have been better assisted by a great pianist...Kapell and Horowitz have recorded Brahms' 3rd, and Rachmaninov - though exceptional with Kreisler - has not reached such perfect collaboration in Grieg. The only version of one of these sonatas to be reckoned as equal to Seidel's interpretation is the famous Heifetz/Bay version of the 2nd by Brahms. The other are the best versions available in the discography, notwithstanding Suk, Kogan, Oitrsakh and so on.