I have the Koala CD and Mobil traditions. My take on them is that the koala cd is very good for procedural information. It helps with being able to visualize the job before you do it. It leaves alot to be desired in terms of part numbers, and is vague in places. I just got the Mobil tradtions cd, and i love it, just from going through it, and finding the differences between part # on the evos and std, and special edition models. I never have to rely on the very nice, but hopelessly unknowledgible people at the bmw parts counter. There are a couple of areas that seem not to be covered on the MT cd, but i don;t know if they are necessary. EdZ