Hi Frank,
My car had a Painless harness when I bought it, now because of an unfortunate accident I needed to replace it.
I bought an EZ Wiring harness for about $100 less than Painless. I researched and found the EZ to use a higher quality wire than Painless.
I will be installing it in the spring so I can’t help you there.
The Painless harness is about the same cost as a reproduction factory harness. With the repro harness you should just be able to plug everything in and go. With the aftermarket stuff you can move things around, and have more fuses.
I hear Painless has good customer support via the telephone, so that’s a plus, with other companies you are more on your own.
My understanding is the installation is fairly straight forward with the only real difficulty coming with the igntion switch. Instructions are for GM and Ford/Chrysler switches and evidently Sunbeam is different.
Also my car is pretty much disassembled so I have access to every nook and cranny. This may be a consideration for you. And how stock is your car? that’s another factor.
I hope this helps a bit.
Paul