Skoda Superb
Advantages: I love the design of the product it looks solid and rigid. Installation was easy and it took me about 10 minutes. You're getting everything you might need. I like how it works and it feels like it makes some difference. I did not know numbers but it looks like it added some horses to the car. Biggest torque difference is in low revs range. I did not see fuel economy yet, but maybe it is because I used only SPORT mode yet :). GAN app is good enough to control the box. When you want to instantly change the mode in GAN app it not gonna happen it will take 5-10 seconds.
Disadvantages: My car is older then 5 years and I did not get additional 2 year engine guarantee. It was not clear when I purchased the box. Customer support is not very helpful and I hope I will not have many issues to contact them :). It's will be very interesting what happen when I will contact them for other program for my next car :)