The number of stars assigned to a French hotel is determined by a standardized formula set by the National Agency for Tourist Development that does not measure quality.
Stars simply certify that a hotel has certain features. All hotels in France are classified according to 22 factors, such as:
Recently, a 5-star luxury category has been added to the revamped system, and properties at the 4- and 5-star level generally do not invest in facilities without also investing in quality service and immaculate housekeeping.
Still, star ratings do not guarantee the hotel smells fresh, employs friendly staff, or has comfy king-size beds and luxury soaps.
For that information, you must do a bit of digging. Go to the hotel’s web site and look at photos of the guest and bath rooms. If there’s no site or no photos, you should choose another hotel.
If you still have questions or concerns, e-mail the hotel with specific questions. The reply, or lack of it, may be the best indicator of what you can expect when you visit.