Fine Overnight Hotel for Business
I have stayed at the Sheraton Suites multiple times for business while in the Philadelphia area as well as when needing an overnight for international flights. First off, as far as Sheraton Suites go - it is a fine hotel. Its an older property that has been converted to an all Suite Hotel. It definitely looks dated from the glass enclosed elevators to the carpeting down the hall ways and the wall paper both in public spaces and the rooms. 
Front Desk and Public Spaces
The front desk area has been renovated, with marble tile floors, granite counter tops and dark, rich woods. The staff was ok, the first time my room wasn't ready even though I had requested early check-in so they did offer to hold my luggage for me while I went to my meetings. I wasn't overly impressed with the front desk staff, but they were ok in their service level. There is a business center type area on the main floor that is very hip and functionable just somewhat loud as it is near the bar and restaurant area. The Burger Bar was always awesome for both lunch and dinner. The bar area was very open air, with televisions, ample seating spaces and great service. The lady that waited on my had like 20 years of experience with the company! Food was also very good. I never utilized the pool or fitness areas so I cannot comment on those. 
Rooms
The rooms are HUGE and great for me as I need lots of space to spread out my work items. The main living room area has a nice size couch, coffee table, chair, desk area with television. Plenty of light - my only downside was I didn't think there was enough outlets near the desk. I'm not sure on the cost for the internet as I have a wifi card that I use when traveling for work. There is a small wet bar type area with a counter, refrigerator (would suggest a mini bar) and coffee maker. The bathroom was just your standard, typical hotel bathroom with toilet, tub/shower combo, and counter with sink, mirror, etc. There were plenty of towels. The bedroom was very large too. My room looked out at the airport and it was very quiet. The bed was very, very comfy and loved being able to shut the door to the living. 
Room Service and Housekeeping
Room service usually fairly prompt in their delivery, but I felt as though I had a lot of hold time waiting for someone to answer the phone. They also took a while in clearing away old dishes. Housekeeping seemed to offer pretty decent service and I had no complaints with them. 
Shuttle Service
The hotel does offer a shuttle service that I have used numerous times. The drivers are always courteous and offer to help with your luggage. My only concern is that in the mornings, the Sheraton is located in the same area as the Aloft and one other Starwood property so the shuttle back to the airport can be VERY full. Also make sure to tell the driver which terminal you are going to so he knows where to stop. 
I would and plan to definitely stay here again for work because its convenient for me. Just remember its a Sheraton Suites, not a Marriott, not a Hyatt, etc.