When I first purchased AllData I was very reserved about doing so thinking I would only use it once or twice and it would be a waste. Boy was I wrong. Ive used it A LOT! Not just for me but to also help people out on here as well. It has been invaluable with regards to pin outs, wiring schematics, component locations and so on. Very good stuff.

I have a Haynes manual as well. I typically use that for quick information, but when I need detailed stuff I go to AllData.