For me, the Tibits Aarau in the premises of the former Restaurant Einstein is the coziest compared to Bern (both) and Winterthur. It is large, but reservations are recommended at peak times. It is even possible to take a look into the kitchen, as it is brighter and more open than usual. And it has a large outdoor area.
The young team seems to be very friendly and, above all, patient, which is particularly admirable given the demanding regular guests. The buffet is comparatively large and offers a lot of choice. I always eat a lot of different dishes, especially warm ones, and love the balanced, seasoned delicacies. For warm dishes, a warm plate and cover are recommended. A high proportion of the offer is vegan, the rest is at least vegetarian, the declaration is clearly visible including the gluten-free rolls. Since I'm often hungry outside of 'normal' meal times, the continuous buffet offering is a blessing. The price is also declared on the website based on weight. As in every Swiss restaurant, good food (organic, without additives, regional and seasonal as far as possible) comes at a price; You also pay for the ambience, but it's not out of the ordinary. With this in mind: Please remember to tip the crew, they deserve it!