Miguel's place is fantastic! We stayed here for a month after relocating to Geneva from Chile, and we had to quarantine for 10 days upon arrival. We're a family of four and the place had more than enough space for all of us to quarantine and not get in each other's hair all the time. It has a glorious view of the trains coming in and going out of Geneva, which my kids loved, and yet it is incredibly quiet! His bookshelves are FULL of an incredibly diverse selection of books, and his house manual was a godsend. The house is fully equipped with everything you could possibly need. We never used the open bath and, to be honest, I don't understand how you're supposed to use it without making a mess, but the shower downstairs was perfect for our needs, and the two bathrooms saved our lives during quarantine ;) Also, the apartment, even on ground floor, gets great light so you don't need to worry about that.
Miguel was always wonderfully open, responsive and helpful and an *excellent* host. I wholeheartedly recommend his place if you need a large, comfortable space when travelling to Geneva.
The only thing I would prepare people for, in terms of expectations, is that the front door opens onto the sidewalk, so there is no entry door first, and then door to the apartment. When you walk out the front door, you're outside. The apartment is ground floor, but the windows are blinded (not sure if that is the correct term) so you can see out, but passersby would have to stick their faces onto the glass to see in, and there's window shades a-plenty if you *really* don't like that idea.