Very nice, newly refurbished hotel. Friendly and attentive staff. The breakfast was not very good value, at 25€ per person I would expect fantastic food, but it was standard mediocre hotel buffet. Unfortunately the swimming pool was closed, which was annoying as it was the most important facility we looked for in summer Athens. It should really say on both Hotels.com and on Mariott.com that it was closed, not to mislead guests.