Bistango deserves its top rating. We dined there twice and enjoyed superb meals. My wife is coeliac and was in paradise.
There is an excellent and varied choice of courses, all can be served gluten free and you can share many courses.
Wine was very expensive for very ordinary stuff. Didn't matter, we loved the place.
Be warned! You will probably need to book, particularly for more than two. It is a small place, but well worth the trip.