The brakes on my Plus Four started squealing as I drove it off the forecourt and they haven't stopped since. Its booked in for a service fix at the dealer next month. I'm told its an alignment issue (how the pads are presented to the disc) rather than a pad/disc material issue so I think cleaning is only a very temporary fix.
How the alignment issue will be addressed I am not sure but new calipers or caliper mounts or shimming somewhere seems most likely. I'll update when I know more.
CX brakes are not a strong point as many have pointed out - even on the less swift Plus Four. They are certainly easy to modulate and give good decelleration eventually - if you push hard enough and far enough - but mine has very long pedal travel, poor intial bite and is a bit spongy. Again the dealer has promised to look at it but I fear someone will tell me it is a CX charecteristic.
