The webelectricproducts.com kit was really easy to install. It included everything. Plus, it didn't cost $10 extra to have the brake lights stay solid like the sequentialtaillights.com kit.
I highly recommend webelectricproducts kit, I paid with Paypal and it got shipped the next day
Took me about 40 minutes to install, but that was because I kept running into the house for tools and to look at the online instructions. The included instructions are the same instructions (really thorough and easy to understand) but the online ones had color
Jon