AC Milan is a bit outside the center in the area near a train station and the big cemetery. You'll be near a Metro station that is only a few stops from downtown. The Park Hyatt puts you right exactly in the center of Milan next to the Duomo and the Galleria. If you're ok with a bit of commuting and the slightly grittier neighborhood you should be fine and can spend the 200 Euro a night (or some fraction) on great food, shopping and taxis. I can see the case for either place depending on your budget and how much you value a stay in the posh center versus what seems like a good business hotel.
If you're considering Marriott, you might want to consider the Marriott Milan on Washington. Rates can be good, neighborhood is nicer than AC Milan/train station. Hotel is comfortable.
Av. Giorgio Washington is indeed a nice neighborhood (I have a client nearby and I'm there quite regularly), but it's a bit far from the center and even a Metro station.
I originally ruled out the Milan Marriott Hotel due to it's distance from the city center, metro, and train stations (as sighted by ckendall). After JMN57's post I thought I'd check again I am now reconsidering it again because:
a) No charge for a second person
b) Actual lounge and/or breakfast is included for those with status
c) Milan Marriott rates have come down (while AC's have actually increased)
d) The AC Milan really isn't that close to the Central Train station (Stazione di Milano Centrale) [It is close to the Garibaldi Train Station, but we won't be needing that one]
NOTE: Based on BKKLEE's comments in the Milan Marriott thread if I go that way I'll make sure to bring google maps printout for the taxi
I find that the harder I work, the more luck I seem to have.-Thomas Jefferson
It's not tyranny we desire; it's a just, limited, federal government.-Alexander Hamilton
Last edited by MyTravels; Dec 10, 12 at 6:31 pm..
Reason: added link