We had an enjoyable stay at Bella's apartment. It's a spacious accommodation, and we loved how well situated and connected it is (30 sec walk to metro station Nestroyplatz, quiet though lively neighborhoods nearby, close to supermarkets). It was very clean and provided the basics we needed for our extended weekend. Check-in and check-out were easy and communication with Bella goes smoothly.
That being said, we do think a couple of updates can be made to make it worth its price. We were a bit disappointed in the quality of both the bed/mattress/bedsheets and the curtains (which consist out of 2 small panels that cannot cover the full surface of the windows, thus ineffectively blocking the light). The bed itself consisted out of cheaper materials, that did not quite stand the wear and tear from intensive use by many travellers (sheets pilling, creaky noises from the wood..). A couple updates would improve the sleeping experience and make us reconsider coming back for our next trip.