Hilton Garden Inn Philadelphia
We chose this hotel because it offered a Jr Suite that could sleep a family of 5: 2 doubles & a sleeper sofa. When we arrived to check in at 4pm our room was not ready. Before I could even begin to think about complaining, they offered us a free complimentary breakfast, which was nice. 
A couple of negatives before I get to the positives: The pillows were mushy. The mattress was soft, but worn out. It was like sleeping in a tunnel. We only had 2 towels in a room that slept 6. We asked for extra towels and were given 1 additional towel. The fire alarm went off in the middle of the night & sounded for 15 minutes straight...not their fault. It was triggered by a smoker, but it was still not fun when you have children in your hotel room.
The positives: The room was very clean. The bathroom was spotless. We had enough room for everyone to be comfortable. Chinatown is a block away and we had a superb dinner at Wong Wong Restaurant. Reading Terminal Market is right next door, which is a real treat. There is also a Wawa across the street for snacks, sandwiches, etc... The historic sites are 4 to 5 blocks away. The walk is not bad and we never felt unsafe. We were able to leave our bags in a secure room when we checked out and we spent 3 more hours exploring the city.
Overall, for the cost & the location, I'd say that we would go back to this hotel if we were to return to Philly.