The page is in front of me at 1600x1050px browser window.

First thing I have noticed, and this is sad because the landing viewport is very nicely crafted, simple enough but completely informative. So where am I?
First thing I have noticed it is slideshow, that pushing the Blue down. This is your main page where you have one time chance to impress your visitor and you better make it as close to perfect as you can.
Again, after all (after page is loaded) the impression of that, visible part of the home page is great and the message is clearly explain what you could find here.

Now lets scroll. Hmmm The block below the slideshow, I don't feel like it is best place to place :) it. Also the transition is mixing the letters.

After some scroll you lose the access to some of the useful links, such as Pricing, Sign In, Watch Video, but most important no access to the Free Trial button.
When you have landed to the site, two buttons taking your attention, but after some scroll you can't actually access them anymore.
I know that you always could scroll back to top, but hmmm... Naturally, these features should be always accessible.
By the way, fixed content can help to define the page in better way, especially, when you do not plane to overload your page with other prioritized information.

And last thing.
The page below the top Blue section feels too empty.

And one more.
I have found two buttons at the footer - Download from App and Windows stores. Something telling me that it is not the best place for important info, again it is depending on the content priorities, of course.

Thanks for creating,
Maxim