In general, it's a great place to stay. The flat is super comfy and the location is great, quite central but not noisy. The flat is also much bigger than it seems in the photos.
The reason I might not give in a 5/5 would be certain aspects of the bathroom.
1. the hole in the ceiling above the shower. It doesn't affect the shower but bits of dirt and water fall from it.
2. The shower door seems to be broken.
3. The bathroom door is a bit finicky.
None of these things really affect one's stay but they are worth mentioning.
Another thing worth mentioning is that there is a patio connected to the bedroom which is nice but it does have street acess. I wouldn't leave the back door open for that reason.