I would 100% recommend staying at Alessandro’s apartment. My partner and I stayed there for about 2 months and loved the flat.
The flat itself is spacious, stylish and felt like our home in the end, rather than just a place we were holidaying in.
The area was perfect, it’s about 10-15 mins from the centre of town by foot but this is what we wanted. It felt local, rather than tourist but had plenty of shops and restaurants within a 3 minute walk if you need to get anything.
It made our time in Firenze.