I stayed there for a month working remotely. tl;dr would totally recommend, this is a great place.
The place is very spacious, it has a living room with a large comfortable couch and a bedroom. For longer stays it is ideal for a solo traveler or a couple. The house gets enough light, but not direct sunlight on most of the day. Furthermore, it has all the amenities that you might need, including kitchen thingies, a washer, and an espresso machine. The internet/wifi is fast (around 180+mbps download, don't remember upload but it was good as well), although I had to restart the router 2-3 times during the month.
As others have noted, the location is ideal. It is close enough to the touristy spots but in a very quiet neighborhood that does not get the loud touristy crowds. There are some great bars around this area, with my favorite by far being Bar 7. For a quick meal, restaurant Olympia is just around the corner -- mediocre food, but it gets the job done.
Michal was a great host. He answered all my questions promptly and he's in the premises quite often so you can have face-to-face discussions with him as well.