We (four adults) stayed for a week in Stefano and Nika's apartment during April 2018. The apartment is absolutely fantastic. Communication with Stefano and Nika was great before, during and after our stay. Both welcomed us to the apartment and showed us around, when the Wifi didn't work Nika dealt with it very rapidly (how did we live without these things?), and checkout was also simple and uncomplicated.
The flat is well appointed, has everything that you could want, and is very stylish. We liked the little 'Juliet' balconies overlooking the canal. We didn't explore the local restaurants much, just went to the pizzeria on the Campo St Polo on our first evening, which we found very good. We mostly stayed in at night and ate in the flat.
The location is excellent as well. It's around 15 minutes walk from either the bus terminal or the railway station (assuming that you don't get lost. Don't rely too much on Google maps). It's also only about 5 minutes to the Rialto bridge and a further 10 minutes to Piazza S Marco. The Accaddemia and the Guggenheim are also in easy walking distance. It is great having a place like this after a long day exploring and visiting museums and galleries, and we felt privileged that we didn't have to take a bus or train out of the city in the evenings. It is amazing how the atmosphere changes when the crowds are gone after around 7 pm.
If you are looking for a place to stay within Venice, you can hardly do better than this.