The apartment is basically one 4x4 meters room that serves as both a living room and bedroom and a 2x3 meters kitchen that has a double bed that can be opened and would take all the space in it. It is well equipped.
We were 4 adults and we managed, it was a little cramped but it is very reasonable.
The owner is great - he came to the apartment to show us around, was available on the phone and also helped us when we forgot an important item when we left.
The bathroom / washroom is tiny in American terms - but very common in Europe - it has a shower, toilet and a little sink, there is ample hot water for 4 adults to take a 5 minute shower.
There is a washer/drier combo, microwave, small oven and a 2 elements hot-plate. There were ample dishes, pots, etc.
You do need to get soap and shampoo and the body towels were smaller than what we are used to in the US - but still manageable. WiFi was excellent and there was a TV too - but we didn't spend any time watching it.
Do note that there is no AC (only heating) - so if you come in the middle of summer - don't be surprised. We were there in June and it was OK.
Everything was clean, smelled good and from what I understand, the owner's daughter lives there too.
The location is great, there is a nice supermarket just about 3-4 minutes walk from there and the street is quiet
Overall - it was really a great value for money.