"Sap" is unusual for Alice in Chains, in that it has only four official songs, "Brother," "Got me Wrong," "Right Turn," and "Am I Inside." It's also unusual in that it features Ann Wilson from Heart and Chris Cornell from Soundgarden (among others); these were (and are) other Seattle-based musicians who believed in AIC, believed in how good they might turn out to be (as they'd only released one full length album previous to this, "Facelift"), and wished to make music with them.
Basically, I'd give 5 stars to both "Brother" and "Got Me Wrong," because they are slower than most AIC, but are still extremely powerful. "Brother" is about child abuse; "Got Me Wrong" is about relationship problems. I'd give 4 1/2 stars for "Right Turn," as I really like Chris Cornell's contribution here (this song is almost impossible to describe). And I'd give 3 stars for "Am I inside," because although I love the beginning and most of the singing, I still am unsure what this song means -- and I've listened to it over 100 times.
The fifth song is untitled; it's more of a demented jam session. I've heard it called "Love Song." I wonder what had just happened to Layne Staley and Jerry Cantrell, if so? They must have had tremendously bad experiences right before recording this, as it's the darkest and most depressing song they ever did -- full of distortion, overdubs, intentional feedback, and lacking any sense of vocal harmony _or_ vocal power. I'd give this song a 1 1/2.
Anyway, because most of the songs are very good, I've rounded up, and give this CD a solid four stars. Basically, if you like AIC, especially if you like the "softer" side of AIC as evidenced by "Jar of Flies" and "AIC MTV Unplugged," you will like this CD.