For me, a lot of it would depend on if I was planning to eat at/visit the places included on the card. Wayne is right when he says that a lot of those places you will be able to pick up/pre-register for coupons giving money off so I don't see where you are making additional savings. Personally, we wouldn't eat at the vast majority of those places either.
It really depends on what your plans are and whether the additional savings on the off-airport check-in and free phone call would be of benefit to make it worth buying.