Had an issue with another companies (Ezy fit rollers) installation, so I asked The Roller Shutter Dr to come and take a look. They found that the installation (2 years ago) hadn't been done professionally causing a clunk when this shutter closed (there was a screw that was driven through the ball bearing joint and the screw was loosening and then when I closed the shutter this screw was catching causing the noise) The Roller Shutter Doctor corrected the fitting and now the shutter works like it should. If only I had found this company 2 years ago.
I would highly recommend this company they are reliable, professional and most important ethical.