I've been to the Mad Hyatt many times. Do not expect anything much as a upgrade. First of all they don't have that many rooms I would consider a upgrade. The staff is also very proud of their Hotel and hence keep those close to vest. I would fax the Hotel in advance of your arrival asking for a upgrade. The rooms are smallish so getting a roll away in is not a high possibility. As for a Diamond you will get access to their buffet breakfest. This is a good deal. I will be staying at the PH in 02/03 and will advise if this is before your departure. Why don't you double book just in casse. I've heard good things about the PH. Staying 3 night on a FFN. A good deal.