The free car rental day in 2009 worked perfectly for us, no rate-jacking at that time, but it looks like it is problematic for the 2010 promotion.
The Hertz weekly truck rate includes a free day, then we got an additional negative a la carte day off our 2009 truck rental. The only 'jacking' was the mandatory $2/day theft protection since I was using the AMEX premium rental insurance, but I still came out $55 ahead last year and the Hertz rates still show a free day with a week's rental if you do the math. We stayed 1 week each at 2 different properties on our 2009 trip (Sun Reef Village one week and All West one week) so renting from Hertz made lots of sense last year for us. Basically, 3 free days!
We were evidently part of the 'early' 2009 promotion group, where we submitted the form and copies of our passports right after we made our reservations. We got our checks and deposited them before we ever departed, no problems. Horrible to see someone post others received rebate checks that bounced later in 2009. Knowing that, I'm even more OK booking our 2010 trip through Maduro since I saw the same airfare on Orbitz, and see the $200 per person directly deducted in my itemized Maduro invoice for our 2010 trip.
This time the total truck rental rate with All West is lower, even including the All West insurance (no airport fees makes a big difference!) but I'm not able to use the AMEX premium rental insurance with All West. No big deal, never had to use vehicle insurance yet on any trip we've taken, but the ZERO deductible and primary coverage from the AMEX premium plan is something I use all the time with companies whose primary business is car rentals. I'm using it for my upcoming trip to St. Croix, renting a Nissan Frontier from Budget, even though my personal auto policy applies in the USVI per our State Farm agent.
Man, wish I was there already - either spot! Won't be long though . . .