Skip it. While I wouldn't go so far as to call it a scam, it is often sold to people who don't need it.
If some day you notice a lack of power, you might try pouring a bottle of fuel injector cleaner into the gas tank. If that doesn't work, you might consider purchasing the fuel induction service.
My Honda has 207,000 miles on the odometer, and I've never had this service done on my car. Every once in a while, for peace of mind, I buy a bottle of fuel system cleaner and pour it into the fuel tank, but even that probably isn't necessary.