I have used the U-Fix-It-Center a few times. The biggest job was fixing my air conditioner for the dreadful Phoenix summers. It was pretty much a breeze. I can turn a wrench but had little idea of what to do to fix it. Andres and Doc totally helped me figure it out. They have all the tools you will need and if you aren't comfortable doing something the staff will help you out.
As a side note if you do end up going I would check out their Facebook page for monthly specials.