Yeah there's other pedal boosters nowadays. Of course that's going to happen when something that works can be copied. Sprint Booster was the original throttle booster for over a decade. There's reviews of Sprint Booster back in 2006 and they won multiple SEMA awards. SprintBoosterSales.com was their first distributor. Probably why they're labeled as "USA's Leader of Sprint Booster Products"
To me the Sprint Booster provides a lot more control. It doesn't up the horsepower but it makes it feel like a whole different truck. I saw some good reviews on other forums and i came across SprintBoosterSales.com "most popular" models for Sprint Boosters and I saw Chevy Silverado was listed on it. Gave it a try because of the 30 day money back guarantee and i'm very happy with it. I know a lot of people think it's BS mod but don't knock it until you try it. It is definitely fun to have.