The Restaurant at Hotel Hermitage Luzern
The restaurant at Seehotel Hermitage Luzern is acknowledged by professional travelers. Out of 3 reviews that we monitored, 2 acknowledged the restaurant, such as Oyster and Frommer's.
Hotel Hermitage Luzern 
Oyster
Frommer's
Oyster "There's also a chic and cozy restaurant that's particularly popular for Sunday brunch"
Frommer's " With its own 'beach' in summer, ice rink in winter, jetty, tennis court, and two restaurants, it's a swanky retreat with some beautifully renovated rooms in soothing, neutral tones, and each with a south-facing view of the lake (deluxe rooms have 'open' bathrooms, from which you can gaze at the lake as you soak in the tub) and private balcony"
