The Hotel Schwann is as well located as you could want, right on the main market square where the abundant weekly food markets are held every Friday, Saturday and Tuesday. We finished a Rhine River cruise in Mainz and the Schwann was our home base for three days post. The hotel is an easy walk from the cruise ships. The owners, Klaus and his wife, are charming and very helpful when strategizing a day's activities. The hotel is clean and comfortable, historic and as authentic as it gets. In good weather, request a room that does not face the 'Dom' church as that side hosts a very popular outdoor restaurant. Speaking of restaurants, the owners' children operate one of the best traditional German restaurant/tavern's across the alley way, in a building equally as historic and ancient as the Schwann. Breakfast is substantial. As a base for walking the 'Altstadt' or old city of Mainz (and we did a lot of walking), the Schwann was perfect. This is a quirky place as some other posters have mentioned, but for an authentic German hotel, frequented by Germans themselves, with comfort and superb location, I doubt you will do better for the price.