I had an issue with the car rental company and their availability, when I spoke with Carflexi about changing the booking they didn't advise me that I would need to pay their (carflexi's) full credit charge and excess waiver again if I amended my booking. I am extremely angry about this, as if I had been advised then I would have just booked through the car rental company rather than lose a significant amount of money. Don't bother using this service, will mislead you to get as much money as they can. It's not cheaper than booking directly with a car rent company at all.
Misleading, not cheaper than booking directly