At the risk of being branded a heretic, I will venture the opinion that not everything this incredibly influential band touched turned to gold, so a well-chosen greatest hits package is just the thing for novices and the curious, and that's exactly what this album is.
The songs are presented in a basically chronological order, so you can trace the band's development over the course of their four albums. Each album is represented with multiple songs, and the B-sides and rarities aren't just collector bait, they easily merit a place on the record--especially "Sauget Wind" and a wonderful cover of the Stooges' "I Wanna Be Your Dog." I could take or leave the live version of "We've Been Had," however--the album track (from Anodyne) would have been a better choice.
Still, 89/93 is a good value and a great introduction to one of the better bands of the 90's. The album tracks are well-chosen, I'm glad that the rarities are generally available, and the liner notes are well worth a read. I would not hesitate to recommend this as the UT album to buy to anyone who was going to buy only one UT album, and isn't that the ultimate test of a greatest-hits package?