4D hockey has been an excellent fit for the development of my son. My son started training with Petr at 6 years old. He has gained the confidence needed to execute the techniques taught to him by Petr and his core of high level coaches. My son has refined the skills through the program of repetition and it shows in practice as well as game situations. Petr and the 4D system will be an ongoing tool in the continuing development of my son. It is a system that truly works as well as keeping the fun and enjoyment in the sport of hockey.