My 1.8T AGU recently became really lumpy and my specialist discovered a faulty control module for the coilpacks. Whilst changing this and the rocker gasket he noticed that my cambelt, which had only covered 30K miles, was badly cracking.
So, I promply ordered a replacement Contitech kit. The mechanic also recommended that I also order and replace a hydraulic damper. He said that it's an item very often overlooked and that it can cause your belt to snap. After he'd done the work he showed me the old damper and the very poor state it was in. The damper had actually seized and it was very fortunate for me that it didn't cause the belt to snap, especially after covering 107K miles!
So if anyone is getting a cambelt replaced make sure you also get this damper along with your kit.