I only noticed the very top bar the second time I loaded the page. I was looking for more content to help me determine whether this was a legit site or not, and I couldn't find it.
Breaking the bullets out into the grey boxes is awkward.
"Its pretty advanced" I'm not sure you want to put qualifiers like this, it's either advanced or it's not. If your target audience knows about the techniques you are using for the calculations, there's probably not a need to even say it's 'advanced'. Maybe you could get away with 'sophisticated'?