I stayed two nights at the Independence Park Hotel. The main factor for choosing it was the location. It is close to the subway station (Market-Frankford Line, stop at 2nd Street), which makes it easy to travel from and to the airport (the combination of airport train and subway makes it easy and cheap to make the travel between airport and hotel). It is also near the historic district (Independence Hall and Bell of Liberty being the top attractions). You can easily spend a day walking that historic district and it is very convenient that you can go by the hotel for a short break. The hotel is also on walking distance from the waterfront, where you can take a ferry to Camden (every hour on the hour, 7 dollars). Note that Camden has not much to offer wrt sightseeing, but the view on Philadelphia City from that site of the Delaware river is quite nice. Finally, the hotel is also close to stop "2" of the Phlash route, which makes it easy and cheap to make the trip to the city centre, all the way up to the museum area.
The hotel is good and clean. Rooms are rather basic (very high ceiling, but not that big), nice bathroom, standard tv. I did not have street view (you will probably have to pay more for that), but that didn't disturb me since I was mainly there for sightseeing outside the hotel. The complimentary breakfast is very basic (toast, cornflakes, fruit, coffee, juice), which you can "upgrade" to eggs and some other stuff for 5 dollar (+ tax).
Service and staff were very good. Nice thing: around 4 PM you can have some free drink and cookie in the hotel lobby.
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