Site looks good. Your call to action could be more prominent. Took a me a few seconds to find it because it didnt really stand out. Maybe changing the button color merging it with the register link that is higher up on the gray background. Because the button is orange, at first glance it doesnt stand out.

Your register for free option is a little confusing. I dont see a free plan on the pricing page, so it makes me wonder what I'm getting for free. Can this be changed to a trial period of 15 or 30 days?

Good job on highlighting a plan on the pricing page. Making the highlighted plan a little more prominent would be better. Right now, the only thing you've done is raised the gray box with professional. Adding more cues would be better, like a border around this one or maybe a shadow. Not too much, but a little extra to make it stand out more.