We spent two months in the Parnaso apartment and we had a wonderful time! Luca is a great host, very helpful, kind, and responsive. That place is clean, bright, and comfy. We also loved the neighbourhood with its villas and parks and that Piaza le Cure is close.
I was in Florence for work and the flat proved to be ideal for a longer stay. It is 25 minutes walk both from the center and from the EUI. The flat has everything you might need during your stay. Highly recommended!