Not sure there is a proper answer to this question. All of the major wiring manufacturers make a competent kit, some may be better for particular cars or wiring requirements. Most are good quality and will meet the needs. Painless is a favorite as is American Autowire, and Quik Wire, EZ Wire and Ron Francis. I like Ron Francis because I prefer to run only the wires I need and still have growth potential. Others are prewired and if you don't use all of the connections then you got to find a place to hide them. But it really is personal choice.