i gotta say i do not like them.
they arent needed. shit like 36 chambers, forever and all the early individual cds, and no said date lately had none (to my knowledge, feel free to correct if i am wrong).
they maintain a certain flow and sound to them without outside shit. the new ghost and method man and stuff like that has some good songs on them(ghost more than meths), but overall they just sound like a bunch of songs put together. not a flowing peice of music.