I have not leased, but I did look into it. I decided against it because, as some do not know, the insurance on a leased car was a lot higher, bringing my payments higher than a car purchased new.
I also planned to keep my car, which I did for 7 years, after it was paid off to save money. This also worked out very well for me.
My husband used to lease a car and he always was very careful not to drive a lot because he could only have a certain amount of mileage on the car or they would charge him for extra miles once the contract was up.
Then, the contract came up at a really bad time, financially. We had just had our first child and he had been recently divorced and we could not afford the downpayment for another lease. To buy the car he was leasing was insane! They were asking the most ridiculous price because they know it's easier than getting into a new lease if you are financially strapped. We had to let the lease go and share my car (which was awful) for over a year.
I never saw the benefits of leasing, unless you are someone with a good cash flow who always wants to get new cars every few years. If you are set on payments for the rest of your life, anyway, then it is a good deal. Some people don't mind car payments and if you are willing to do that, you can get (sometimes) a nicer car for less a month by leasing, just knowing your downpayment is kissed goodbye and that when the term expires you have to do it all over, again.
I know a rich family who lease, but that is because the wife insists on a new cadillac every year. She has to have the latest and greatest model. So for them, leasing was a much better option than buying new each year because of the hit they would take on resale value.
That is all that I can tell you! Hope it helped! :-)