Nicola's place is as described. The location was very close to the Duomo. Easy to get to, it cost about 12 euro by cab (and was a good option).
It was great to have a full kitchen (fully functional) and a washer. The shower was good, the water was hot. The wifi worked great.
It's within the ZTL so you can walk everywhere - about 15-20 min to pretty much anywhere. (Uffizi, Ponte Vecchio)
Nicola was unable to let us in, but had a friend show us in. That said, it was very easy to get ahold of Nicola and the response time was very fast.
Would definitely stay here again.
Thanks, Nicola!