NIco's apartment is located at 10min from San Marco square, but in a quite part of Venice. For us this was really perfect! You can explore Venice easy. Also getting to the apartment is really easy and is simple to find. Or course the taxi-boats are perfect in Venice and getting to Nico's apartment is an easy travel. Check in was perfect and the communication around checkin was spot on.
The apartment itself is located in really nice old building and has an elegant mix of old Venician and modern items and has everything you need.
Again being in the centre, yet in such a quite ' street' made the visit to Venice really great.
We would definitly consider staying at Nico's apartment during a next visit to Venice.