especially renting domestically ?

I have tried every possible one (those that are deemed "safe") on our upcoming Hawaii trip (one weekly rental at Maui) - the lowest rate it ever produced, still like $90 higher than a plain Budget rate using either an AA or an UA discount code for an intermediate - what gives ?

I assume renting overseas, such as we will do for a trip to Scotland, using Avis code may produce great savings. I have yet to test them.

But, what is the big deal of these Avis discount codes ? We dont know if they provide CDW or not, if even if they do, when there is really an accident, would it cause problems ?

I hope those who had the misfortunes of having accidents using those codes would post their experiences.