It's only a great savings if you find value in it and if that is the food you and your daughter want to eat. There are 3 restaurants in IOA and 3 in US. There are a few discussions on these boards about it and if you are not aware of the participating restaurants and what they serve go to the universal orlando website and see if it for you, or do a google search and type in universal meal deal.
JMHO, there are so many cool places to eat at USO at all price points, I could not restrict myself to 3 restaurants per park....but that's just me.