The product as a product gets 5 stars because it does exactly what it promises: it makes the throttle respond much faster, with 18 different options (1-9 in sport mode, 1-9 in race mode).

The differences: depending on the mode you choose, it gives you greater responsiveness (smoother and more "wild," respectively).

In my experience:
For CITY DRIVING, especially on roads where you often encounter potholes, I now have it DISABLED. This is because as soon as you hit a pothole that you can't avoid, it will make your foot go up and down, resulting in your throttle feeling it and you driving like a beginner still trying to learn how much throttle to apply.

- 1 in sport mode: is good for city driving **without potholes**, because what it does is "boost" the throttle a bit, deviating slightly from the default operation.
- 4-5 in sport mode: is OK for city driving if the road is smooth WITHOUT POTHOLES, because even a slight up-and-down movement of your foot from the throttle will be felt, and your car will behave like a beginner still trying to learn how much throttle to apply.
- 7 in sport mode: is the best for highways and ring roads (e.g., Alimos-Katehaki).

- 3 in race mode: is what suited me on the highway, especially for overtaking, as just "gently touching" the throttle is felt and it responds fully. At first, it’s almost certain that it will stall because you haven’t learned it yet.

So, generally speaking, I have it set to 5 SPORT and 3 RACE so that I can easily switch whenever I need a little... "boost."

P.S.: I haven't tried the others for long or for many kilometers because, for example, as soon as I found the mode I liked the most, if I changed something that bothered me, I would take it back to where I liked it.