Hi - Have a basic question on the flexibility of changing my rental return date on an on-going reservation, and impact to rate/cost.

On Hertz perspective, changing rental date was extremely easy. If returning early, I could just drop the car off early, and my rate would be updated to reflect as if my original rental was for that time period (i.e. a 2 month rental may have had a multi-month discount applied, but if I returned 1 week early, I would have been charged 1 month + 3 weeks). If extended my rental, I could call either the rental location directly or their 800 Reservation line, and rentals could be easily extended with no convenience cost.

At Avis, when reading their policy, they say on early rentals my rates could change... which I get, but is the change similar to the Hertz example described above? I know some other rental companies also charge an early return fee -- does Avis do that? In terms of extending my rental, their policy says a $10 convenience fee is charged. In practice, do they actually charge that? If I call the local rental location, can they potentially extend without charging the fee? (The customer side of me feels that they should be grateful I want to keep their car longer, instead of charging me to do so!)