the only thing good about it is that when a gas station is normally lower in price then other stations the prices seen at this gas station still might be lower then others nearby. So it does give you somewhat a good view although not accurate.
I haven't found this to be true. If the prices presented were all of the same age (i.e. today, 2 days ago, etc) I think it would be true. But, as Gatorguy said, prices can be up to 5 days old. This has always been the case, even though they have only recently added the disclaimer.
With a 5 day pricing window in an era of rising prices, a station that's generally lower priced, but showing todays price, can easily look higher priced than the generally higher priced station showing a price from 5 days ago. Combine this with the fact that no age information is provided for individual prices, and the service is virtually useless. With the speed at which information can be processed and delivered these days, there's absolutely no excuse for a pricing database to have five-day-old information.
I did find the service useful on a recent trip to Washington, D.C.. It helped me determine if gas prices were generally higher in the state I was in, or in the state I was about to enter, allowing me to buy gas in the lower priced state.
Why do I have the fuel price service at all? My LIVE services includes fuel prices. If they offered the other options without the fuel prices, I would take it.