Ordered it for installing it myself.... Would do that different the next time, I think they charge 40€ for the installation, hard earned money I can tell you, took me a couple of hours. Read the instructions before, thought that's an easy one. If you are an unpatient person... save you life and let them do it! Main pitfall for me, I followed Roy's instructions (thanks for that), but in my case i first had to bring back the big fan and then the PCB, because the PCB makes the screws inaccessible. But putting the PCB after the fan was in was also more difficut as these few words, nothting special readlly, there is just not enoght space. Gentel force and trying it in 10000 positions made it. There came a new fan with the new package, should I have replaced the small fan with that? Maybe, at least after the installation there is a fan running right from the beginning. Driving experience I do not know yet, just did one function confirmation lap and need sleep now.