Cons:Using your website to reserve a car with Dollar Rental it gave me the option to get collision insurance, which I did for the convenience of being able to simply walk away if there was any damage. But then it turns out this insurance is not really with Dollar Rental but with Alliance Global Assistance, a completely separate company that has nothing to do with Dollar Rental. So when I get to the Dollar counter to rent my car and they ask me if I want insurance I tell them I already purchased it. Then they tell me that the insurance I purchased, on your Kayak website, is not with Dollar Rental. I already have excellent car insurance with Amica which would give me exactly the same coverage as Alliance. So the whole reason for purchasing the insurance, which is to be able to simply walk away and avoid the hassle of getting my own insurance to cover a dent or accident with my Dollar Rental, is not there!!! There's no benefit at all over my own car insurance!! So I would categorize this as a deceptive practice on your part, on Kayak's part. When you offer insurance with a car rental you should make it clear that this insurance is not really with the rental company at all. This is typical deceptive money-grabbing bullshit of a large online company. Probably won't use Kayak in the future.