It works like the normal Google Streetview. When you drag the little Streetview icon over to one of the blue roads you will see the original (Before) Google Streetview image of that area. The difference is that once you have an image up, you can now click on the After tab and a picture will pop up of that area now.
|Click on the image above or below to interact with this location. Be sure to rotate the view.|
It is interesting to see how some areas were almost identical and others almost unrecognizable.