We would definitely stay at Gelso again! Compared to hotels in the area, it was really lovely, quiet, stylish, and a good value. Perfect for our family with kids, since the two bedrooms are large and separated enough that we could stay up after they were in bed. The air conditioning was a real boon (hint: if you stay in the loft bed, you'll need to set it a bit cooler than you think, since of course heat rises). The communication was clear and reasonable, and walking up flights of stairs is good exercise. The bathroom made me want to remodel my house.
Nota bene: compared to American and British hosts, it seems more common for places on the continent to downplay the "bnb" portion of "airbnb." Thus, though there were some nespresso pods and a machine, you'll need to make a run to the store if you want milk and even basic toiletries like soap and shampoo. Again, not a criticism, just surprising after being used to hosts elsewhere leaving tea, coffee, jam, bread, etc.
Picking up the key from / showing a passport to a third party with no apparent relationship to air bnb was unconventional and not ideal, but perhaps this was an unusual situation.