Lithium, the featured song on this single, is my personal favorite song ever. It has a great guitar lick, perfect pitch change, hard and soft parts, and unmatched lyrics. Been a Son is sort of a punk, fast, fun song that isn't as deep as Lithium and doesn't sound as good, but is still worth a listen for sure. Crumedgon is not very colorful, has some lyrics that are ok but not great, sounds pretty terrible to be honest. Really, this single isn't worth it, you should go out and buy Nevermind (which includes Come as You are, Smells like Teen Spirit, Nirvana's biggest hit, and of course, Lithium), which, surprisingly, is only a couple of bucks more than this. Every track on Nevermind is pure revolutionary grunge from the pioneers of that genre. So buy that, not this.