Took my g/f 5 years ago to it over New Year. I didnt enjoy it and we both got very sick from the train journey out there due to the germs being passed through the air conditioning. We had to have a doctor out to the hotel and as a result it screwed a lot of plans/flights up for the rest of the holiday (we were only supposed to be in Paris for a long weekend whilst on holiday in the UK).

The actual park wasnt my sort of thing due to me not enjoying theme parks and it being freezing. I much preferred the Paris sights.

My 2c.