Lovely, interior designed little hotel 3-5 minutes from Luxemburg RER / metro station and Luxemburg gardens; round the corner from Pantheon; 15 mins walk past the Sorbonne (university) to the Seine and Notre Dame. Lots of quaint side streets with almost too many restaurants,offering 3-course dinner from €10 - €17 per head. We tried French and Italian, and in both cases had a lovely meal (not gourmet, obviously) and wine, for under €50 for 2.
This is a very small hotel, but cleverly designed and finished to high standards: the bed was wonderfully comfortable, the toiletries were l'Occitane, the TV was Loewe. Very quiet - there wasn't a sound at night. No tea/coffee facilities in the room, but complimentary tea / coffee with 'madelines' in the lobby. We also liked the 'honest bar' - a selection of drinks in the lobby, where you help yourself, write down what you have had, and pay on check-out. Light buffet breakfast available for €15 each, but we chose to try out the local cafes. Staff lovely and friendly. Warm, friendly and laid-back atmosphere. Some great, casual pubs nearby with English speaking staff - the nearest WOS (Wide Open Spaces) Bar was offering a free drink to customers wearing tartan when we were there on St Andrew's Day!