98 2.8 a4 timing belt replacement?

I want to change the timing belt on my car by myself. I found a kit on Blauparts that has everthing the dealership said they'd replace and more including step by step instructions. I work at a machine shop where I could keep it inside for a day or two and have access to every tool imaginable. Why should/shouldn't I do it. Oh yeah it'll save me a thousand dollars to.