Very nice location - it is easy to reach the sights of Mainz and also to have a stroll along the river. During my stay there was some construction, that was not very pleasant. Also, make sure you are staying in the main building, or you will have to walk a long way with luggage... and help was not offered, although I had 2 suitcases. European hotel rooms tend to be small and drab - that was the case here too.
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