It's a few years since we went (before the Studios were open), but from what I remember, I agree with the above - especially eating at the Blue Lagoon and watching the POTC boats float by. When we were there, the people in the boats shouted 'Bon Appetit' to the diners, and the diners shouted back 'Bon Voyage' to the people in the boats! Great fun - don't know if they still do that!
Space Mountain is a better ride in Paris than it is in WDW - sorry, everyone, but it is: it has a vertical loop in it! The equivalent to Tomorrowland is very well done in a style they call 'retro future' (i.e. it looks like a 19th Century vision of the future). (Pirates is also better in Paris.)
Star Tours is pretty much the same ride, but in French!
Indiana Jones is a another ride with a vertical loop: when we were there, they ran the whole thing backwards - can't remember why!
There's a nice little train ride, based on the circus train in Dumbo, too. And a maze with characters from Alice in Wonderland. Oh yes, and a windmill ride...
We also saw a fantastic show, based on Mulan, with Chinese acrobats. As I say, it's a few years ago, so I don't suppose it's still running. But it was one of the most wonderful things we have ever seen!
The other shows were good too, and done in French and English. (And Chip 'n' Dale are called Zig and Zag, if I remember correctly!)
Have a great time!