I received my Vitesse yesterday. As others have said, install and setup was very easy. It took less than 5 minutes.
I'm very happy with the purchase. I know it doesn't add any power or horsepower, buy it certainly "wakes the truck up". The ability to have immediate throttle response makes the truck more responsive and definitely more fun to drive. Feels safer and inspires more confidence too because you get the response you expect immediately, with no lag.
You can change the setting as you drive which is very convenient. I've been switching between Sport mode 3 and 4. Those seem to be the sweet spots for me. If it's snowy or rainy, or you want less input for towing, you can quickly adjust back down to factory settings, or even decrease the input below factory setting if you like.
I'm sure the competing models like Pedal Commander work just as well, but I can't see them working any better, so for the price, the Vitesse makes sure makes sense for me.