A cheap chip

[acfarmboy]

I was researching about EGR deletes and found a company that makes a "chip" that fools the EGR system into thinking it is above 5000ft. It keeps the EGR valve closed and may throw a code about the EGR system being closed. Nothing on the system is removed. Other than that it supposedly has fuel economy increases on average of .7mpg, and more hp. It is not expensive either. Has anyone used this to verify this actually works or is this a gimmick product to obtain better mpg's and horsepower?