Honestly, this is one of the worst libraries I've ever purchased. I am consistently disappointed with these Zero-G titles. In my opinion they are nowhere near up to EastWest's standards, but EastWest is not creating them; they're just distributing them (AFAIKT).
Sot70s is a hodge podge of poorly recorded and poorly edited samples, organized into "construction kits" and "toolkits" which offer additional samples organized by category. All of the samples are essentially loops which have been sliced for use in the Intakt player. I bought this library because I have to create some disco and 70s-style tracks for a big project, and as I listened to kit after kit, I found practically nothing I could ever use.
The fidelity is poor, and there's generally a "sloppy" character to many of the loops. The loops sound ameteurish and have far too much processing. then, when several of these processed loops are combined, you get a phasey "soup," which I find flat-out unusable.
I should have learned my lesson with "Nu Jointz." Sot70s is similarly sloppy and contains almost nothing usable, IMO, for serious music production. Both are like "toy" or "kiddie" versions of what they should have been. A random collection of bad loops thrown together to form a library.
Needless to say, depending upon your needs, YMMV. But I personally give Sot70s a grade of F-minus.