Pros
Reasonable pay, coworkers are really great people, learn many things about cancer research, good benefits, working on something worthwhile, can travel (depending on your position), located right in Old City so you can take the train (or the buses or bike), secure building, nearby shops and restaurants, there's always meetings going on so getting a free lunch/snack is a possibility several times a month, annual company picnic and holiday dinner, upgraded technology, nice offices.
Cons
No flextime, no days in lieu even if you work massive overtime, no daycare, work-life balance is not good, very high turnover rate, some upper management expect their staff to work overtime and be available by phone and email anytime. Some positions do not advance very quickly-- could still be in an entry level position after 4-5 years with only minimal increases.