We had a wonderful few days at Nico's place! It has to be one of the most incredible locations we have ever stayed and was so central. Walking everywhere was so easy and Nico went above and beyond as a host at every opportunity. If this place is availible - book it - you won't regret it.
The only important note I might add for other guests is: the building is very old (like 1500s) so someone who is on the taller or larger side might be a bit uncomfortable navigating some parts of the apartment.
Will be crossing our fingers this place is available for our next visit in Florence!