Having experience installing garage doors and openers I wanted to purchase a 6690 L model. These are the better models that supposedly do not contain plastic parts. The web site is useless. The AI Chat is usless. I finally got to speak with a human and they insist you have to have a dealer install this unit. I contacted dealers in my area and they all jack up the price to just under what it will cost to have them install the opener. The only way you can buy one is through the big box stores but you can only buy the cheaper quality Chamberlain models. Total BS company with horrible customer service.