My wife and I had to visit Nantes several times recently for medical reasons and picked 7 Urban Suites for its central location and facilities.
Spacious, squeaky clean room with a wonderful little kitchenette, nice breakfasts and very secure parking made every stay very easy when trying to make extended appointments in the city centre.
The staff were very helpful and friendly and in our time off we found the Old City an interesting and friendly place to mooch. St Peter's Cathedral at its centre is about a 20 to 30 minute walk.
Restaurants are a good walk too but buses and trams stop outside the door all the time.
Food to heat and eat in our room was also easy to find (one good bistro/shop was next door).
If the hotel management ever read this the only improvement we could suggest would be a couple of chairs that were a bit more comfortable than the ones provided, particularly as many guests, like us, eat and chat in their rooms for quite long periods. Otherwise it was near perfect.