Marco's place is very well located.
Seemed to only be a 10 min drive to wherever we wanted to go. It was also great to have the dedicated driveway to park on, as I wouldn't have fancied parking on that road.
Loved all the thoughtful little touches, and having the the mini kitchenette to make coffee / reheat meals. It was a bit awkward washing the dishes in the bathroom sink, but it worked :)
The only negative for us would be the lack of soundproofing. With it being part of / under the family home, you really do hear everything! It was not noisy late at night or anything, so no problems sleeping, which was definitely appreciated.