We stayed in this airbnb with 4 people (2 couples) in august 2021.
The appartement looked smaller than expected on what we saw from the pictures so I would say this airbnb is good for 2 people but too small for 4 people.
There is one big room and a smaller room in the back which really is tiny (and without air conditioning) the annoying part is that to reach the second smaller room in the ack you must go through the first big room in order to access the second small room.
As for the shower, there is no much water pressure (even as the first person in the shower) and there is barely any hot water which is really annoying.
The wifi was barely functioning as soon as 2 people were on it.
Another negative point is the noise. We got woken up almost every morning at 7am by the upstairs neighbors talking and moving chairs around. At about 9am, the postman also rang the doorbell every morning for the mail which was also pretty annoying.
Aside from these problems, the location (canareggio) is really great to stay in with a lot of great and local restaurants on the same street of the airbnb. The host of the airbnb was also very helpful and nice and gave us tips on where to eat/what to do.