Nice hotel but take ear plugs
We stayed here recently after a trip to Boston and the hotel was nice enough but it could do with some updating, the decor didn't look like it had been changed since about 1982 in our room, can't speak for the other rooms. Our room was a big size but a very old tv with limited channels, though we weren't in Philadelphia to watch telly. A fridge in the room would be good as it was very hot and it's nice to keep drinks cold.
I'm afraid I disagree with other comments that there isn't a problem with noise from the freeway. Our room overlooked the freeway and I had to go out and buy ear plugs as the noise was bad even with double glazed windows and I live in london so I'm used to noisy cities.
The hotel restaurant was really good, very nice food and the "wine flight" taster option (wine tasting of 5 different types of wine for a set fee) was a great idea and a good way to sample their huge range of wines, but a tad expensive at $30. However, we were on holiday so what's a few extra dollars here and there. 
It's a great location in the Old City and the staff were perfectly nice but if you get a room at the front or side of the hotel you may want to pack some ear plugs, the noise is not the hotel's fault and I slept fine once I had ear plugs!