It really has everything you need. Nice storyline, quality beats, sophisticated lyrics, good flow, some nice dark sounds, fitting samples... There are more spectacular rap albums, but Oneirology has a very high overall-quality and is very coherent.
My favorite album of theirs. It feels like Kno just nailed the overall mood for the album and it might as well be a 50-minute long song. Each track just smoothly transitions and flows on from one to another either with the help of an interlude or by continuing with a similar theme. I also love how pessimistic some of the material on this album can get, yet there's that one slight hope for optimism that Stars Shine Brightest offers, it even being a bit unlike most CL material, yet still having their sound.