For context, my partner and I stayed in Missy’s flat for 3 months, so some of the issues we found may not be much of a concern for shorter stays. Overall, the flat is ok. The location worked well for us. There is a Tesco Express literally next door, which was very convenient. The security guards for the building were very nice and helpful. There is enough stuff in the kitchen to do some cooking and it's a spacious place. There was a bottle of sparkling wine waiting for us when we arrived which was a nice touch.
We found the bed, couch and table chairs to be uncomfortable. The "curtain" in the bedroom is just a piece of cloth taped over the window which kept falling down. The boiler was leaking when we arrived resulting in scheduling multiple visits for it to be fixed. After having someone come round to fix it, the water initially improved but then continued to run hot and cold (although it went from being very erratic to manageable).
Throughout the stay, we mostly dealt with the host's sister - who was nice and seemed to be trying to be helpful but it slowed down communication and even made it non-existent at times. It proved ineffective and frustrating. As one example, halfway through our stay scaffolding was erected outside without notice and we woke up to builders walking around outside the bedroom and living room windows. After raising this, we were told they were supposed to begin work from the top floor, but that still didn't explain why we weren't given notice as it would still have required the scaffolding to be erected. From then, work (including drills etc) began early, and with people walking around outside it made the space less private.
As we said at the start, overall the flat is fine and for shorter stays a lot of these issues wouldn't crop up.