Booked with Wisecars about 2 months before my travel for half the cost of all other rentals. As the date approached I read all the negative reviews and started freaking out. I looked into booking another car as a backup but prices had gone even higher. I got a confirmation from wisecars a day or two before my travel that gave me a Dollar rent a car confirmation. I typed the number into Dollar's website and it looked legit. I was very nervous about the whole thing, but when I got to Denver everything went about as smoothly as I could have asked. I know there are a lot of negative reviews, but I had a great experience for a great price. -- Good Luck.