Subaru forester is an excellent vehicle. If your car is paid off, can seat all family members and in good working order, might be better to keep it. Leasing can be tricky if you drive a lot, or have a long commute. Most leases allow only 12,000 miles per year, and charge exorbitant overages. However, if your current car cannot accommodate you and you drive very little, then a lease may be the perfect choice.
The real benefit of a lease is this: after your lease term, your car is "used" and can be purchased for the "used" value. Since you are the one who has been driving it, you know exactly how well it has been maintained. Therefore, it is a safe used car to purchase, inexpensively.