We arrived at our hotel (Leopold) and our room overlooked this restaurant. We decided to try it out as we had been travelling all day. We were asked if we had a booking, which we did not, however, they managed to fit us in. There were large groups at a few tables, but the kitchen coped admirably. We were given a glass of pink fizz whilst we looked at the menu, plenty of good food to choose from on the menu. I had the linguine vongole, which was perfect the desserts were beautiful. The staff are always on the move but never rushed a pleasurable meal in nice surroundings and very pleasant staff. 2 course meal with a bottle of wine 80 euro for 2 people.
Tried to get in on the Saturday and Sunday, however, was told on the Sunday afternoon (it was open for a private party) the restaurant did not open at the weekend.
Must be because the European Parliament which is less than 400 metres away only works Monday to Friday.