Carlo's loft is gorgeous! Yes, it is up four floors with no lift, but this ended up being a bonus - you are above the street noise, have wonderful views, and a great way to work off all the amazing food you'll be eating in Florence :)
The location was super central and the loft had every amenity, including multiple towels per guest and an actual double bed (rather than 2 single mattresses on a double frame, which we've found to be quite common in Italy).
Carlo was super responsive and accommodating, and made our rather last minute booking super smooth.
One of our best Airbnb experiences, ever.