I found the Port-Royal to be a charming spot to spend one night in Paris before a flight out the next day — good location in the 5th, walkable to many spots in the Latin Quarter. Didn’t have to deal with the pay showers but I can imagine it may be off-putting to some — the wash basin in my room was enough for me, and it added to the turn-of-the-century boarding house feel that was amplified by the courteous staff and homey touches. Verdant courtyard, even in January.