I stayed in Lucia and Umberto's flat for a little under 4 months. It was a terrific stay and I would absolutely recommend it.
The home is modern and beautifully decorated, Umberto and Lucia have clearly put a lot of time and effort into designing everything. It gets a lot of sunlight all day long, and the balcony is great for a break in the evening.
It has a fully equipped kitchen with very high quality appliances.
The internet is a reliable 55Mbps download and 30Mbps upload, which is quite good for Germany.
It is well located. There are a few supermarkets a 5 minute walk away, and a couple of different train stations 10-15 minute walks away. There are a few nice looking restaurants and coffee shops nearby too, but I didn't really get to try them because we were in lockdown at the time.
All in all it was a fantastic stay.