We arrived later than we thought we would so we couldn't meet with Roberto after calling him, but anyway a lady - from the next door apartmant let us in and gave us the keys when got there. There was no problem though her english was basic.
The apartmant is a quiet, little hideaway from the crowdy downtown. The bathroom is particularly neat and we found the the whole place clean and tidy. The palace's old halls definitely enhance the Firenze experience and the garden outside oozes the smell of Toscana. At least in May. It's a pity the gate was closed all the time and we couldn't check it.
All in all I'd recommend it for everyone.