This was my favorite Test Pilot experiment so far. It's very helpful to have an easy way to pull up cached content when a site is down.

When you get a 404 and the page can't be found it looks to see if it can find one. Super hand.

Really buggy since a year ago. Shows the notice e.g. when simply navigation back and forth as others have mentioned.

Works very good and saves a lot of time by showing missing content!