Stairs, stairs, stairs. Not a problem for us except getting our heavy suitcases up and down was not enjoyable. However, stairs are a normal part of gorgeous old houses like this one so unless you have real mobility issues don't worry about it.
Ideal location within walking to everything, free parking on site, good strong wifi, spacious well appointed room. Special mention to the very spacious and comfortable toilet and shower in our room. Hostess was a delight and every detail and comfort was provided. Breakfast was excellent. I will definitely stay here again if I visit Chantilly in the future. If you want great value stop looking and book this now!