Using the Banks iDash 1.8 SuperGauge is easy. First, make sure it's compatible with your existing iDash system as it's not a standalone kit. Connect it to your vehicle's OBDII port, and you'll start getting data on the customizable LCD display. When towing or just driving, keep an eye on the readings to understand your engine's performance. Remember, all sales are final, so choose carefully. As for maintenance, keep it clean and dry. Avoid exposing it to extreme temperatures. If you want to expand its monitoring capabilities, you can add different sensor kits as needed. Also, note that the features may vary depending on your vehicle's application.