No argument there, everyone should play it. Even internet drive-by scalpers.
Speaking of which! I decided to partake in the Freedom Bundle, despite owning a few of these games of which I now have duplicate keys that I am willing to share:
World of Goo - claimed
Superbrothers: Sword and Sorcery EP
The Stanley Parable - claimed
The Swapper - claimed
Thirty Flights of Loving - claimed
2064: Read Only Memories
AI War: Fleet Command
Rocket Roller-Derby Disco Dodgeball - claimed
Guns of Icarus Online
Q.U.B.E. Director's Cut
Hey these are all seriously solid games, and totally worth the asking price. Which, not to drive the point home with a sledgehammer, but totally free in this case. All right I haven't played 2064 and Rocket Roller whatever yet, but I bet they're pretty cool. PM me if you want one.