I booked a car with them with automatic transmission at a very reasonable price, got an email confirmation with a booking code. Once I arrived at the pick up station, the employees there showed me that Carrentals in reality booked a manual one. The pick up station offered me an automatic one but I had to pay twice more than the initial price in Carrentals booking. When asking Carrentals to reimburse me the overpayment they sent me the following answer: “My apologies for the confusion that you had at the counter when you PickUp the vehicle, please take notice that you have selected a 'Pay Later' reservation, this type of reservation locks the rate offered in the website at the moment of finalizing the reservation, the main utility for this will be that it will prevent of getting higher rates compared to the ones offered when the PickUp date is closer from the date when you make the reservation, however, this type of reservation can be cancelled at any time without any type of penalty fee, the supplier may experiment a high demand, therefore a vehicle cannot be guaranteed.” As I understood from the actual service and what was proved by a Carrentals customer help employee reply is that booking with Carrentals guarantees you nothing. I even suspect they use this smart play of words and cheating clients in a way to get more commission in the long run. Don’t use them and don’t recommend them to anyone.