Isabella & Monica are both great and wonderful.
My review is build on 3 aspects
1) Location
2) The House
3) Hospitality & Communication

1) Location:
Location is near the smaller train station of Florence, Campo De Mari which was great help from me and I sued each morning.
Location in on elegant historic streets & buildings, very nice area, elegant , upscale and has nice things around.
Location was still not far from downtown and the outings areas
I would go walking
or evening when I arrive back to Florence each day I land in The large train station Santa Maria Novella and enjoy downtown, food etc. Then take a taxi which was always 13-15 Euros, and only one time 18 Euros (as I asked guy to tour a bit to show me things)
I was going daily to Bologna and back and it was very convenient from the apartments as explained above
2) The House:
Super elegant, high quality everything, very good fresh smell (no odors ) and super super super clean and well maintained.
Comfortable , and have nice things you need to make your stay comfortable and efficient.
3) Hospitality & Communication
Isabella introduced me via email to Monica who handles all the daily needs and communication was fast, professional, friendly and helpful.
Hospitality was great
Handling my issues, questions, needs all were dealt with nicely.
I give one example Monica was booked to check me in and waiting for me one evening, then I got lost and my train arrived in Rome so I did not go. Then second morning we rescheduled and I met her and checked in.
All nicely and with decent communication.
I told Isabella and Monica I will do my best to come back in 2018 :)
Special Thanx to Airbnb:
Really thanx to Airbnb such a wonderful idea, company and service
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