I have heard nothing but good about painless wiring harnesses, less their cost, lol
Take your time with the project, you don't wanna get burnt out on it and give up. There will be some months you barely seem to make any progress at all, and other weeks that she'll fly ahead.
Also, make sure that you can afford to do this right now, I've got about 8 - 10 grand into my truck, and it was just a quick econo-frame off (few new components, just making old ones look new, or fixing problems as I go) Some guys have up to 25 grand into their trucks to make them look the way they do. Either that, or expect it to take a few years
All that said, good luck man, and have fun! This is a great hobby as far as I am concerned, and the end effort is well worth it! I am starting to see the light at the end of the tunnel, and my truck is finally starting to look like a truck agian