I did not stay at the B&B, but I got their early for their Breakfast and a Tour program ($35). If you do this as well, make sure to both call ahead for a reservation AND confirm your reservation the day before. When I got there, the cook had not been told that I would be there. Fortunately, she was SUPER nice about it, and still had things set up in the kitchen for the B&B guests, so I still got food - which was amazing. I highly recommend the French toast w/ bananas.
The tour started after breakfast and was given by the great-grandniece of Degas. The "House" is actually two houses that used to be connected, and you get to see a bit of each, including the room that was Degas' studio during his 4 month stay at the house. The tour is more of an education on the family history of Degas than of the actual house, but you get some of that as well. Over all, definitely worth the $35! (I believe just going on the tour - without breakfast - was $10 or $15)
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.