Dude, it's not worth it at all. It's way too expensive for a little thing that doesn't really help ya at all. It only tells ya how much fuel used and your average mpg is, that's all. You can do the exact same thing when you have paper, pencil, a calculator, and a little time on your hands, exact same results, even more accurate too. The computer is usually not accurate, especially when it's displaying the "miles to empty". I never trust that thing because it's obviously false.
The lights out indicator does work. One time my brake light went and when I checked, it surely is out. This feature is another waste. Again, use a few minutes of your time in the morning and check the light bulbs to see if they're functioning. If it's out, replace it. It's that simple. This computer is just another one of those useless gadgets in the car.
