"Absolutely fantastic hotel if you want to see the Palace or just wander round Versailles (or both). It's about 3 minutes sedate walk to the palace from the hotel front door. I'd recommend spending multiple days here in order to get the full value out of the palace, gardens and park, especially if you want to do the full experience with Trianon.
The breakfast and dining options are good, the staff are fantastic, friendly and multi-lingual, and the hotel itself is also genuinely impressive.
The area is full of friendly and welcoming people. There are lots of restaurants in the area, and the patisseries... if you like baked goods, you might need to be dragged out.
If you're tall (over 6'4) then the lower ceiling for most of the bathrooms might be inconvenient, but they have full headroom over the shower section."