We've bought it and tried to use it a couple of times but didn't get much use from it. There used to be more participating restaurants in the tourist areas than there are now. Good coupons for car rentals and, maybe, ticket discounts to Universal and SeaWorld but I think that those are probably in non-Orlando books as well.
I wouldn't recommend it but you might find places where you'd use it. Go to the entertainment.com site, type in Orlando as the location and you should be able to see a lot of the participating businesses.
Dick Taylor