Using this Cobb Accessport V3 A - Pillar Mount is easy. First, find the right spot on the driver's side A - Pillar of your 2015 - 2021 Subaru WRX or STI. Then, use the spaces between the panels to attach the mount without the need to take apart the interior. After that, place your Accessport on the mount and use the swivel to set it at the best angle for you. When it comes to maintenance, just wipe it with a clean, dry cloth every once in a while to keep it looking good. As for precautions, make sure to install it correctly to avoid any damage. If you have any issues during installation or use, refer to the product manual or contact customer service.