The tooltips would be ok, but they overlap the bullet icon, which makes it feel cluttered. I'm ok with the idea of changing some part of the page based on my movements, but I think it'd work better if you changed the screenshot (perhaps with an illustration of the feature) instead of overlapping the bullet icon.

The animated screenshot with the balloons feels very busy.

As I was typing this up, "Robby" popped in and asked me to talk with him. This feels a little too eager - and I'm never sure if these popups are real people actually contacting me (which makes me feel a bit uncomfortable) or just automated (which is annoying and makes you wonder if there's really someone there or not).

All in all, the site feels busy. Your 37Signals style "Premium Plans" page is a lot easier to follow, but it suffers the same balloon tip problem.

I'm not sure "complete protection" is a good two-word summary of the premium feature. It kind of implies that my data's going to be released to the public unless I pony up some cash...

It looks like it has potential. Sort of a simplified / low overhead Evernote.