i dont know why lskohn did not press further for free brekkie as AC is supposed to give free brekkie for plats.
In any case I stayed at AC Firenze for under 40EUR on LNF rate. Excellent upgrade to 1 bedroom suite, amazing brekkie for 3. All in all great hotel. Located less than 5 mins to the centre of Firenze, and just outside of the ZTL.