I went through the discounthawaiicarrentals dot com site. When I saw the price drop I called them on the phone and they cancelled my old reservation and confirmed the new price with a new reservation number. The old reservation was through Thrifty and the new one is with Enterprise. The lady told me to keep checking as the rates could drop up until 2 days before our trip starts.
On the Trip Advisor website there are nothing but good reviews for this rental company.
I can't believe we got a full size car on Oahu for 11 days for $249.75 and on Maui the same car class for $285.84 also for 11 days. This includes all the taxes and fees.
Now if only the price of a minivan will come down, I would be really happy and switch.