Local news here has a segment called "Deal or Dud. " They tested that device to see if the claims were true or not. What they found out was that it was a dud, it only dropped the temp in the car a whole 2* not the advertised 20* on their commercial. I think the tv commercial stated car #1 was 107* and car #2 was in the lower 80's. Car #2 had the autocool in it.