According to the math Cheshire Figment did in this post:
http://www.disboards.com/showpost.php?p=48233473&postcount=6
one only need spend $469.48 to break even with the TiW card.
That's not hard to do, even for two people. That's about 8 TS meals for the two of us, so 4 nights. We usually get 18-21 nights out of our AP, so the TiW is an easy YES for us.