Car leases, for the average person, are not a good deal. As a former accountant, I can tell you that leases are good for individuals only if they are financiall well-off, want a new car every 2 or 3 years, do not know how to work on cars, and do not put on a lot of mileage.
I agree with Ryan (damn! twice in one day) ... The leases are pretty much ironclad. How long has she had the car and how much longer is the contract? How is she doing on the mileage? What's the mechanical difficulty?