We spent 6 nights in Mario's apt and were so happy we picked his place. The apt is right in the centre, a 10 minute walk from the train station and less than 5 minutes so restaurants, supermarkets, coffee shops etc...
Mario was extremely helpful in giving us some tips on places to see and eat and very responsive with any communications. The apt is well equipped with everything you'll need kettle, toaster, good hairdryer etc... and Mario kindly left us a welcome gift of wine and sweets.
He suggested the food market and its a must if you're a foodie, produce for sale downstairs and every type of cuisine available upstairs.
One downside is the apt doesn't receive much natural light due to its position but if you are like us you'll be out enjoying beautiful Florence all day as there's so much to see!
Thanks Mario for sharing your apt!