The Restaurant at Hotel Opera
Hotel Opera's restaurant is mentioned by professional travelers. Of the 5 professionals that we monitored, 2 referenced the restaurant, like DK Eyewitness and The Telegraph.
Hotel Opera 
DK Eyewitness
The Telegraph
DK Eyewitness "At Gandl, the restaurant
next door, you can enjoy
an excellent dinner"
The Telegraph "Rooms are idiosyncratically decorated but all impressive in their own way, and there’s a charming Italian-esque garden and two associated restaurants"
