If you love Phil Spector, or if you're a 50s/60s pop/rock lover, this is required material for your collection.
I can't review tracks individually due to the volume, but I must say that they are ALL worthwhile. Any one of them justifies the purchase (River Deep Mountain High; Then He Kissed Me; Be My Baby), and there are many undiscovered classics in this set (ex: Black Pearl or any Darlene Love track)
Phil Spector has influenced rock and roll immensely, and this box set is a testament to that; these tracks define music history.
I found the sound quality to be very good; don't complain that the tracks are Mono if you buy it (the title should inform you of this condition); I think Stereo would in fact ruin some of the appeal of these records.
If you liked this set, I'd recommend also The Best Of The Ronettes (from ABCKO); there are many important Ronettes tracks that are not here, and that group was probably Spector's most consistently excellent. My only complaint: "Here I Sit" really should have been included instead of "Woman In Love (With You)".