I have had a ARB in my Jeep since 1994, and have had trouble with an air valve and several relays, other than that a great traction device. . I have redone my system where I use the roll cage as an air tank, and a converted a/c compressor on the engine converted into an air compressor. So, I dont use the arb pump or relays and it has been trouble free since.
You'll like it!
Robin