I think you'd benefit from replacing the screenshot of the "my office scheduling" page on the homepage, with an explanatory graphic. The text there is too small to read, but I found myself squinting to make it out to try to glean the features I could expect from the product. As an example, I cite Highrise's homepage: http://highrisehq.com/, where icons and descriptive text are used to better present what I can do with the application.

I think that having two metrics of plan/pricing levels is confusing. I'd like to purchase by users in my office, but I don't care how many gigabytes of storage space it costs you. It's also not clear exactly what counts towards that storage quota. Will you be tallying the space used by my calendar events in your database? Will there be a feature where I can upload large files to share with appointments? I couldn't find an explanation of why I'd want to pay for storage space anywhere. Once this is defined, maybe an add-on of 'n' gigabytes of addon storage can be purchased for those requiring the additional space- but right now it just appears to be one more thing to confuse someone about to make a purchase.