Walter is a great host and the most informative we encountered. He is a super nice guy and filled us in and all the best sites, museums and affordable places to eat. He speaks perfect English.
His apartment is pretty cool. It has a great location right by a popular square by the south side of the city. His places is also directly lined up to a major bridge so it is easy to get back to even without a map. The apartment had an alluring historic vibe with ancient rafters and even a soon to be restored Mosaic on the bedroom wall. It use to be a lodging for Nuns in training so there is a spiritual essence around as well. The apartment has a plethora of literature on the city and some entertaining books as well. Thanks Walter!