The service of KTM Twins is Excellent. I am a little disappointed in the format of the disc though. I had to use older software on an older Mac Computer, because the newly installed OS for Mac would not read the disc. From there I had to covert to PDF, and because the file is so large, still having trouble putting on my iPad/iPhone to review while on the road/trail. As per other reviews, it is not the simplest in format. For this specific product, I will have to give it an "OK" due to formatting and ease of use.