I've got the DDM, 50W kit.
installed it on the high beam, never worked, gives a lamp error and no light. just blinking when switched on. But if I connect it directly to the battery it works fine. sent a zillion emails to the support staff, called them as well. they told me to get the error eliminator (I don't remember the exact name. they come in pairs. I bought them but the problem persists. emailed them again and called, and no way to have an answer. obviously I had to reinstall the original halogen and tape the hole in the cover.
As apparently there is no way to have a refund. I am thinking of installing it through a relay. but I am seriously upset by the lack of seriousness of this provider.