It is a nice appartment located on the 3rd floor , and there is no lift so be careful if you bring a lot of luggage.
Nicolai is very energetic and nice, the apartment is spacious and quiet. As it is located in the residential part of Venice, there are less tourists and the places are quite empty and less expensive. However, it is a 30min walk from the touristic center and it is quite hard to understand the public transportation vapporeto (don't trust google too much, ask around)
overall, we had a nice experience and I recommend this BnB for people who want to get out of cliché Venice !