Setting up NOW internet service

I have a family member who may be interested in switching from their ATT DSL to the new NOW xfinity internet. Probably the $30/100mbs service. They are elderly so I would probably help them set it up.

They have a local xfinity office about 2 miles away. Can they simply sign up and pick up equipment at this local office? Or would professional installation be needed? If so, how much?