Well, here are my thoughts. We are a family of four (two boys aged 3 & 7) and we went to Disneyland in California in August and Disneyland Paris for October half term. I would love to go during term time as queues are VERY long when the massess are on school holidays...but I'm too scared to take additional school leave! Both California and Paris are of a similar size, but for my money I preferred California. As well as similar rides, they seem to make much more of an effort at night-time with nightly fireworks and the lake-side Fantasmique show which is all smoke, water and lasers (very impressive)The friendliness and service is much better than the French offer too! (sorry) In California we stayed in a lovely hotel about 30 minutes away and spent a day at the park then a days rest at the hotel before heading back which was great. In Paris we stayed in a Disney hotel and did 3 days of parks on the trot...very tiring. After the expense of the entry tickets, you will be paying for meals, drinks and merchandise. The food is all a bit samey (fried, fried and fried)and it's not the cheapest place to be, but it is FUN! Of course the weather in Paris is always going to be unpredictable, but it is nearer. We booked very late and only had the Santa Fe hotel to choose from. A bit well worn, and if I go again I would look to stay in the Disneyland Resort Hotel which is right at the gates to the park, so you can nip back for a bit of R&R if needed! Otherwise you have to take a bus to the park. Whichever Park you go to, your children will LOVE it! If you're braver than me, take them during term time to escape the queues (popular rides can often have a 45-60 min wait time) and whilst fast-pass can help, it's actually has quite limited uses.