Second: The 'Learn more' presentation actually says nothing, nevermind that the start page is equally uninformative. Not a single word about techniques used or what makes this service supposedly 'safe' or why I should trust it with my data.
I am highly suspicious of anything claiming to be "safe" or "secure", expecially when it is this dodgy around details. I'd not advise anyone to actually use this for anything sensitive.
EDIT: Just noticed the tiny light-grey 'About' link at the bottom, which gives a little more info. Still, I absolutely dislike the site design.