First and foremost, Patrick will go out of his way to make sure his guests have everything they need. The building is also amazingly quiet, which is great for business/study trips, and he expects this quiet to be respected.
The kitchen is great, the bathroom has everything you'd need (and is decorated really fun!), the bedroom has a desk, dressers, and good lighting, with a nice view onto a park. The bed is as comfortable as I'd expect for the price.
the building is close to multiple grocery stores, restaurants, and metro stations. Plus the metro stop is really close to the suburban train system that can go to both airports, and to Versailles!
Overall, a great place to stay for someone looking for affordable, quiet accommodations.