That is a wonderful place worth its price fully. Clean, self check in, smooth communication, everything needed are there both in kitchen and things like AC, very authentic area and the flat itself, 2 mins from vaparetto station, a bit less tourists than in more central districts.
You can indeed as many mentioned hear very clearly people on the secind floor but we were lucky with neighbours.
2 things about Venice you need to take into account: there are a lot of mosquitos so if there is no anti-mosquito fumigator available buy yours before the fist night. And waste system is quite a challenge but Monica provides a very good instruction how to deal with it.
All in all we highly recommend this place.