Cons:We arrived at the Cancún AirPort With the Kayak reservación for $154 for four day automatic vehicle reservation. We called the rental company and an old shuttle van came and got us and took us to a run down office about five minutes from the airport. When we arrived we were told that they were sorry, they had ran out of vehicles.... They could get us one from another place... But it would just be an additional... $420!!! Are you kidding? We made our entire trip based on the fact that we could have an economic quick get away. After telling them it was ridiculous... Trying to figure out where that number was coming from, and then getting nowhere... We left with our backpacks and walked along the main highway going from car rental place to car rental place until we finally found a car for a decent price. we still paid more than planned but at least it wasn't to those theives. At one point I broke down crying because it was just too much... I don't like being swindled. When I told NUCar that I chose them because it was in a trusted site, KAYAK, they said 'you should know how those sites work, it is never the price you agree to pay' I told him in all of the times I have used Kayak nothing like this has EVER happened. Anyway, we had a great trip, but I thought I should let you know...