Nana's place is absolutely wonderful! It's exactly as pictured (even better in person, in fact). Very clean and modern. Nana and her family right next door, but there is absolute privacy and space. It's wonderful to have her close by for any questions or recommendations.
The village of Karterados is a short walk from Fira town (insane amount of restaurants, shops, scenic views, bars, entertainment). And an even shorter walk away from a supermarket, a few local restaurants, rental car places, mini markets.
Lastly, if you decide to rent a car, there is a free parking lot right around the corner from Nana's place (across the street from Gleekogalousa church) that you can utilize.
Would highly recommend for anyone looking for quiet (but centrally located) immersion into the local Santorini life.