Upsides: it’s in a great location close to pretty much everything, tons of nice little touches that make it feel like an actual home, great use of space, responsive and kind host, and you probably won’t find a cheaper place with a backyard in the area.
Downsides: consistent weird gas-like odor (which you do get used to, might just be old building smell), you can hear the hallway noise pretty clearly from the bed (ear plugs will do fine), no real direct sunlight (but you have the backyard), and when I showed up the place wasn’t really fully cleaned (dusty, dirty floors, unclean fridge, etc.) though the host did their best to get a new cleaner in to do a better job.
Overall, it’s a nice spot and I ended up having a great stay but I would probably avoid staying there in the winter again 😬