No complaints. Works perfectly. Holds well on the ground even on gravel (pleasantly surprised by the way!) Seems very solid (my son used with scooter and bicycle. It does not go gently!) Possibility of 2 springboards for the parts are screwed but I quickly attached for the smallest (5 years) fell because not enough speed. Suddenly, the big flies and landed after the little pass and rolling! Dad also tested and approved. it resists perfectly to 72kg (without the bike! 85kg with bike)