I used Hotwire.com for a car rental in Kailua-kona , HI.  When I read their disclaimer about not disclosing which company I would be using prior to reserving, I was concerned as I surely didn't want the terrible service of Alamo.  I took the gamble and lost.  

This was the first and last time I will use Alamo.  The vehicle was infested with roaches.  The staff was rude and unprofessional in satisfying the matter.  A replacement vehicle was provided upon request and a meager $20 "Quality Service Program"...