Good but unreliable Rated 3 out of 5 stars
I've been using Scrapbook for many months now.
It's basic functionality is great, but on two different occasions it has lost all of the pages I had saved in it. I tried the emergency recovery option but the most recent pages were lost, as was the folder structure.
Perhaps I had too many pages saved (about 500) for the extension to handle but I haven't seen anyt information about a limit.
It's a good way to save a page for editing as long as the Scrapbooked page is edited and saved (almost) immediately as a standard html file. It is too unreliable to use as a form of long-term storage.