We had a nice stay and Erika was very kind and helpful. The description is accurate but here are some things we noted:
Florence was hot during our stay and the space must be kept shut with sunlight blocked out during the day, and opened when it cools off at night. We saw a couple of mosquitoes but Erika provided an electric plug-in insecticide so the insects didn't bother us.
We opened the living room window for cool air at night; there was a fair bit of street noise, including a wine bar patio open on one of our nights, but we slept okay, probably from the exhaustion of our long days of walking.
The loft is low, as the description states. You can safely sit up on the bed, but only a small child might stand. Crouch very low to get to and from the stairs. Plan to leave your suitcases on the main floor and dress there as well.
The loft had a fan that was necessary to stay cool, but its motor began to die on our second night, requiring 5 minutes for it to spin up to a low speed if you set it to "high". Hopefully this will be replaced for future guests.
The bathroom is a bit awkward because the shower and toilet share the same space. There is a drainage issue so Erika asks that you use the provided bath mats to prevent damage to the nearby wooden floor. The shower area needs paint - Erika apologized for this, saying there hasn't been a break between bookings to get in and do the work.
WiFi download speed was OK but upload speed was terrible. Don't plan on backing up your photos to the cloud from here. (Left overnight, my phone got 1 photo uploaded to Dropbox.)
We had some minor communication misses over SMS and WhatsApp when we tried to inform Erika of our flight delay (she didn't acknowledge our messages but it is possible she didn't receive them) but nothing with any consequence to note. We phoned her from the front door and she arrived 5 minutes later to check us in.
Overall, we were happy with our stay in Florence and we can recommend this space to anyone who doesn't mind the items listed above.