Maria's place is very nice and conveniently located. It's kept very clean and the complimentary tickets to Kew Gardens are particularly nice.
A tip: if you are traveling with the tube and with luggage, be sure to get an Uber/taxi to this place, because it is a 15-minute walk from the station. That's completely fine without luggage, but we found it difficult with all of our stuff.
All in all, an excellent experience!