You can tell it what you'd sorta like to have and what you gotta have, and it makes a playlist for you that meets those criteria. Simple, but like Yoda and Thoreau, BAD-ASS.
So what have I done for you lately? I've made a Smart Playlist that plays all the genres I like, but ONLY from the '70s. So basically I'm in heaven right now. If you need to contact me, I'll be somewhere between '73 and '76. Ask Neil Young for directions.