The only problem with these transmission is that they don't handle high power application due to the belt pulley design. The transmission however is very impressive from a typical consumer standpoint if you have ever driven a CVT equiped vehicle.

What looks promising for high performance applications is the DSG (Direct Shift Gearbox) made by VW/Audi. This automatic transmission can shift gears ~0.0 secs and by design handle high performance applications with the use of two conventional gearboxes and a computer controllering the shifting and clutch.