We just did Disney Paris, and it was pretty good. We stayed at Davy Crockett, which is 10 mins in the car, and quite a lot cheaper than the hotels on site. But you still get the extra less crowded hours.
Hint #1, when you drive in ,the leftmost two lanes move much quicker.
The Blue Lagoon is a decent restaurant at West End prices. DL is much less of a rip of than it used to be, but apart form a couple of places nearly all the food is fried cheese and sugar.
You can take in stuff, and fruit bars (like Jordans) are great for managing kids energy levels. A rucksack with water etc will make your life so much easier.
Our 6 and 3 yo loved it, a lot.
Must say however, that I would not do DL in the summer hols. Reports from friends talk of 2 hour waits for 3 min rides. Remember that French summers are on average hotter, and a couple of years ago many people died in the heat wave there. Not a great time to stand in the sun with two kids.
We did late Easter, and the wait for Pirates of the Caribbean varied from 10 minutes down to zero and letting us stay on for another ride. Dumbo was 20 mins, Buzz Lightyear varied from 5 minutes to 35.
Star Wars Tours was 5 to 10, and Peter Pan which our kids loved the most was 25-40.
The Car driving thing is only for larger kids and the queues were epic.
Everything was pretty good, some was excellent, and Disney have tremendously improved their staff from the child-haters they employed at first.
We did 4 of us self catering for a grand total cost.