It's not my favorite Dilla album and I wouldn't recommend it to anyone who wants to get to know his work, as it's not really his typical sound, but it definitely has some wonderful joints and the overall concept/sound is so coherent. It's the story behind the record that makes it so special (Dilla literally producing parts of it on his deathbed and then it being released 3 days before his death).
Just today I was listening to the Pharcyde tracks he produced on Labcabincalifornia, such classics. Little fun-fact: apparently 2Pac's Do For Love sampled Dilla's Y? (Be Like That) remix.
The beat tapes from the mid-90's I finally found 2 years ago are so, so dope. Some of his rawest beats. Look for "What Up Doe Sessions (1996)", "1997 Batch", "The New Slave (Beat Tape)", "SV Tour Beat CD" and "Dimensions of Dilla".