I went off-roading last Friday and caught a pebble to the windshield. It created a pea-sized chip in the windshield with some spider cracks. So I decided to give the Permatex Windshield Repair kit a try. It comes with everything that you need (I picked it up in Pep Boys near the RTV & Epoxy). In total it takes about 45 minutes to repair the crack. It was easy to do and worked well. Just read through the instructions before you start. They have a video demo on their site (http://www.permatex.com/videos/video...hield_eng.html).
Here's an after shot with a circle showing the original size.