I used to work as the Financial Services Director in a Ford dealership. Leasing works great for some people, doesn't work for others. If you drive a lot of miles in a year or have a habit of damaging your vehicle, you should probably stay away from them.
Leasing is not as predatory as it used to be. There was a time when leasing companies screwed the customer every single time, but those days are long gone.
Leasing is nice because you pay sales tax as you go, rather than as one big lump sum, the payments are lower and you can write off 100% of the payments if it is a work vehicle.
Never, ever get into a lease over three years long. You will regret it before the end because even though you may want a new car, you can't get out of your lease as easily as you can get out of a financed vehicle. The other nice thing is you don't have to pay for it if the value of the car tanks in the next few years. Say your residual is $10k and they appraise it for $6k due to market conditions. You can hand them the keys and walk away clean.
Be aware that at the end of the lease, they expect the car back in a sellable condition. They will bill you for broken windshields, dents, burns or tears in the seats etc. They'll also bill you for excess mileage. The mileage is set at the beginning of the lease based on how much you expect to drive. 15,000 miles a year is average for most people, if you drive more than that, be sure and set it up for more.
That's about all I can think of that you really need to know. Your dealership should have a presentation about this all set up and probably scripted for their salesmen. You might ask to see it.