I bought mine from AM and they're pretty easy to install. All you need are these quick splice connectors to hook into the factory harness. And a jigsaw or coping saw to cut a small piece out from your current housing.
Dorman/Conduct-Tite 18-14 gauge blue quick splice terminal (85495) | Electrical Wire Connector | AutoZone.com
The headlamps need a little adjustment to get them centered right but besides that, it's a pretty sweet change to stock headlights.
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Also, they have a brief installation brochure inside the package that's got a few pictures and semi detailed instructions.