A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 102,617
For your times, I like the idea of getting a hotel in Center City, although the Sheraton is a big modern soulless convention hotel.
An alternative is the Marriott right in PHL airport; no shuttle required. As mentioned, there's a train to Center City from the airport about every half hour for under $10.