Don't have any
problem with the braking power, they are more than ample. However the feel of the brakes are poor, I would like to replace the brake lines and use a performance fluid to see if it improves the performance and pedal feel. Though if they are over-servoed it may not make any difference.
The trouble I have is they are either on or off, having had the Cupra R with the Brembo's before the Cupra the feel of the brakes were much better. The Brembo's would give a more consistant feedback through the pedal, where as the Cupra does not. They act more like a switch.
You can press them slightly and get non to little braking action, press a bit harder and your kissing the windscreen. There appears to be very little middle ground.
They are undoubtedly good brakes in the fact they stop you, but they are not all round good brakes for driving.