Before you arrive you can work with the IPO and they will book your ADR's.
As far as the "offerings" you have to be there to use them, and they aren't a meal replacement, except breakfast.
In the morning they have coffee, tea, juice, milk, cold cereals, breads, muffins, yogurts, basically a cold continental breakfast.
At midday they have snacks like pretzels and gummi bears--nothing to make a meal of. You can grab a soda.
Early evening they have a few appetizers plus a cheese tray and some crudites, along with wine, beer, and soda.
Around 8:00pm they offer desserts, cookies, pastries, cakes, etc. plus cordials and soda/juices.
Again, if you are still in the parks you'll miss out on the offerings, and they aren't a meal replacement, just little snacks.
For what they charge per night, IMHO no, it's not worth it. It used to be when you could snag a CL room for about $50 over the cost of a regular room, but now it's $150 or more, and they've reduced services and amenities, so it's no long er worth it IMHO.