im not sure who they went to for training in California, but optimum is from tennesse. if you have any doubts about them, check out the optimum forum...ill look at their site, but i didnnt need any official training to be an authorized installer. i just basically needed to be insured, have a quality reputation, and meet the sale s quota! lol. i've got no probs answering any questions. also, if you are ever in the need for any detailing supplies, let em know. i run a store in Ontario and can give you the details and a 10% discount off advertised prices.
Jeff