The Installation took about 4.5 hours.
The instructions tell you not to put the compressor under the hood or were it can get wet, but shows it mounting on the frame. So where do you put it? The wiring harness section closest to the guage is too short, to connect to the power(under the hood). Had to slice in longer wires.
However once it was all complete I am very happy with it.
Instructions are easily followed and wiring harness makes instalation a breeze. The pump is small and light duty, so I doubt it would be sufficient for large air tank and 4 wheel shocks. It does a great job for helper shocks or small bags and inflates fairly fast on my rear 5 inch shocks. I doubt you could piece a system together that would work any better for several dollars more cost. The gague back light could not be disabled. I cut the green wire, which according to the wiring diagram is the "light" and hooked it to my light switch, but the light still stays on all the time.