DH and I love having the TIW. We do lots of Signature Dining at WDW and have used it since 2010. My parents generally get the DDP but this year they are going to go with us and we will use the TIW card every chance we can. My Daddy likes to have a JD and Coke in the evenings sometimes so I can see he and I heading to the lounge in our resort this November for an occasional drink. They are excited that they can eat however they want and still get a discount.
AllEars has a very good PDF file on their website which lists the restaurants and discounts. It is at the bottom of the page on left hand side when you click on dining.
Love this PDF...very handy...http://allears.net/pl/disc_dining.pdf