Your homepage is OK. The site is missing viewable screenshots of the application. The page with all the features is too long to read. Too much information that doesn't get to the point (ex : "how fast" have a text that goes "it can take 3 minutes to backup 1 Go"). In short, I'll make it more friendly for non-techies.

I like the design but the icons in the feature pages are odd-looking. The sub-menu (overview, comparison, in action...) was invisible to me.

It looks really cool though and I hope you will change the world of backups, we really need it...