We've taken our ds (almost 7) to the Bognor Regis Butlins every year since he was 2, and we're looking forward to the next visit in April. We always book dinner, bed and breakfast, and have always found the buffet restaurants to be excellent.
Once you arrive nearly every activity is free, except for bowling, cinema and crazy golf, and we usually buy an activity voucher which allows us to do them at a reduced rate. The swimming pool is excellent, clean and we've never had to queue to get in.
There are shows for all ages throughout the day, then a choice of two/ three in the evenings. When we first took ds he fell asleep in his buggy whilst we were watching them, now he joins in and enjoys them.
Yes it's cheap and cheerful, but we've always found it excellent value for money - 4 nights, breakfast and dinner, a nice room with sofa, tv and fridge, lovely clean bathroom - under £600 for three of us in the Easter holidays.
We went to Disneyland Paris in August last year and paid £1600 for three nights, breakfast and dinner. Lunch cost approx £60 each time, no matter where we ate. We spent almost £300 on food and drink when we were there, mainly because it was so hot.
At DP breakfast was continental and was at 7am so we were starving by lunchtime. At Butlins we had a full English every morning at 8-30/9 and rarely needed more than fruit at lunch, which they encourage you to take from the restaurant at breakfast. In DP we weren't allowed to take any food out of the dining room, even if it was because our ds was too tired to eat it then and we planned to give it to him later (strict timings for meals in the hotels).
We queued for hours in DP, and often the rides shut down and weren't available anyway. At Butlins the queues for the funfair rides etc are minutes long. There's also the beach, which is great for knackering out a small child just before bedtime!!
We did love DP but even my son (on the Eurostar home) said can we go to Butlins next time?
We have said we will go back to DP in a few years when we've saved up again but we will still keep on returning to Butlins each year cos we all enjoy it so much and find it relaxing. We just potter around following our ds and let him choose what we do. DP was exhausting!!!