The site looks good. It's a nice, clean design, you provide enough information, the information is clearly laid out, and presented well enough so that someone can quickly get the basic idea without reading every word. The site loads quickly, and you've used a variety of visual cues to separate and present your information. Very nice.
On the other hand, your video tour is painful to hear. Please get someone with a more neutral accent to do the voiceover for each presentation. I mean no offence, I am actually greatly enamoured with cultures, languages, dialects and accents of the world. But if you plan to do business internationally, people have to be able to understand you. Please normalise your audio, get an engineer to clear it of noise, fix the EQ, etc. There are too many places where it sounds like the mic is being accidentally knocked and it's painful. If you don't have the resources to do this, consider modifying your presentation so that the sound can be muted and closed captioning can be turned on, so that people can read through the presentation instead of listening to it. Additionally, consider adding a static, screenshot + text walkthrough of the installation, configuration, and site modification/maintenance process for people who don't have either the time or the bandwidth to watch the video tours.
I can't comment on your product. Your target is small businesses and entrepreneurs, and it is possible that Oxygen CMS offers them enough value to make the purchase. I'm not part of that demographic, though. I am an individual providing design/development services to others, and as such, there are other products that offer me a much better value than yours. In the free version of Oxygen CMS, the number of pages I may create is limited, your logo may not be removed from the site, and it may not be removed from newsletters. My only other option is a $199 version. Sorry, but some of the most popular and well-supported blogging platforms and content management systems -- namely WordPress, Movable Type, Drupal, and Joomla -- are opensource and/or free (Movable Type's free personal edition is far more flexible and powerful than Oxygen). Please, don't misunderstand. Your target audience consists of people who may not be technical, who may not be code-savvy, who don't have the time to dig in and customise templates. But developers who have the time and ability have better options available.
Hope that helps, and good luck with the site and product!
- Gita