I've used a few off the shelf cheap kits before (Ready Start for the most part, made by DEI who makes a bunch of the other brands too) and for the most part have been happy with them. The wiring looks daunting but if you take your time with it it's not that bad. Also, I bought a harness off Amazon that plugs between the ignition switch and the wiring harness so you don' have to splice those wires.