Seems to do what it claims to do. FYI: I believe the reason we lose history whenever we enter or leave a Google site is that the container doesn't want to associate that history with Google (where you came from, in particular).

One suggestion: would it be possible to have links outside of Google open up in a new tab? That would solve this history issue, letting us go back to our search results if we don't get what we want on the first click.