| There is quite a range of "wavy discs", tbh. Some have a very good reputation such as Braking. There have also been some real cheapies being sold on Ebay mostly. I've heard some horror stories about them. If they are a quality discs and using the right pads, there should be no reason why they wouldn't equal a good standard setup. Presumably, he has bled the system properly and there is no air in the system. | 
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