Wow,  this place is truly amazing.  A great look into French History with all of their glamour, glory, and tragedy. Definitely go with a tour guide or the audio guide so you can get all of the information.  Make sure you leave yourself enough time to wander the vast gardens.   From Paris, it's an easy 30 minute subway ride.

Really great city!  Beautiful churches and buildings- people are very nice and have the BEST fudge I have ever tasted. The Roman Baths are just full of history and culture.  I love this entire place.