It was a New Year's gift.
The construction quality is characterized as average to good. In no case does it reach the level of Hot Wheels in terms of texture and material assembly. The instructions require a great familiarity with the sport.
Relatively expensive compared to what it offers, the details on the included cars are excellent, but what can you do when the wheels break easily because the axles are made of plastic.
As for the stickers, nothing special (that's where the marketing has excelled)