Isabel's flat is in a beautiful building, and Isabel herself was very organised, highly communicative and flexible with us. Some elements of the apartment are really lovely. The main bedroom is large and light and airy, with a very comfortable bed. The twin room is also large and well appointed.
The location is excellent, it's next to a tram stop and walking distance from some great restaurants, bars and shops.
However, the second double bedroom isn't much larger than the bed itself - this room is not comfortable (nor is the bed - rock hard and poor-quality pillows) and I don't think it's reasonable to advertise it for two adults. It comfortably suits one adult or two children. There's a small chest of drawers big enough for one person, but as my husband was using it I had to keep my case in the hallway just so we had space to move around in there. There's also no window in this room, and it's connected to the main bedroom via doors that are quite old and that we couldn't close properly.
The living room doesn't reasonably seat six adults so I think advertising the flat for 6-8 people is a real stretch. If we had two extra people sleeping on the sofa bed we would have been very uncomfortable.
The tram runs from early in the morning til late at night and the apartment has next to no noise insulation. You can hear people talking in other apartments in the building, and within the apartment itself you can hear everything that's going on. A lot of the internal doors don't close fully - they're quite old and warped.
The second shower-room was missing a holder for the shower-head so we really only had the use of one. I think the description could reflect the proportions and amenities more accurately, and some elements of the flat need taking care of.
Additionally, it's extremely dusty. Probably impossible to stay on top of due to the location and proximity to the tram, but it does mean the soles of your feet are black after a couple of hours!
I would recommend Isabel's apartment for max four adults, and would also say that due to the size of the lounge and the slightly lacking kitchen amenities (no oven, stools instead of chairs, located at the back of the apartment with little natural light, no basics left for us to use like salt or pepper), it's arguably not an apartment you would want to spend a huge amount of time in.
BUT if you are looking for a lovely and characterful place to base yourself without needing to spend too much time there, and you're not in a group of six adults with three men who are 6ft+, then for location and a great host I would recommend it!