This company does not adhere to OSHA safety standards. They have employees (or "independent contractors" for the sake of not paying their employees fairly or accurately) hanging from the rooftops holding each other up by their feet rather than being strapped into a safety harness.
I recommend this company if you are looking for an insurance liability or wish to make a homeowners claim because they don't know how to mitigate risk when putting up your Christmas lights. Also, they are liars about their prices and do shotty work. I'd say you get what you pay for but their expensive AND crappy.