As everyone said, if your analog gauge was off, so will the digital LED one.
Overall, it seems pretty accurate and when I have 2 -3 LEDs remaining, my "low gas" idiot light on the dash fires up. One thing however, is I do notice that the LEDs range is not entirely 'equal' throughout the empty to full tank. Almost all of them tend to stay lit (showing full) and only after around 80-90 miles, does the first 1 or 2 LEDs go out. After that, it starts to begin 'counting down'. I wouldn't call them "all on" and "all off" but certainly doesn't appear to be a even as I would hope. Maybe it just needs adjustment but overall, after multiple tank fills, I know when I'm down to 2-3 LEDs, I know I need to go find me a gas station and my odometer confirms its pretty consistant.
Looks way better than the stock and I'm real happy with the results.