A couple months ago I installed LiquidStudio's wordpressbackup plugin, did the setup and checked that everything was working. Which it was. I continued to check it for a couple weeks.
A few weeks ago I had a major meltdown and lost my wordpress sql database. Long story.
I was too busy just then to go to the wordpressbackup website to see how to initiate a recovery, and then when I tried last week, I was out of luck. The front page
is up, but every other page is down with a 404, including 'contact us.' There's a note about updating the software, but that's been there for a week. I did manage to track down an email through the LiquidStudio's webpage and I've written twice asking for information on the status of the plugin and the backup, but I haven't had a reply
So if you are using this plug-in, you might want to and find another option.