As a concept, without having done any research on it, it looks ok. I can see that some people would like to have a bunch of screens on one page in a browser. I’m not sure that I’d use it myself, but I do think some people would like it.
The site itself… from a design point of view, I think is below average. I’m sorry!
A few issues:
-There’s a lack of consistency. For example, the W on the tab (favicon) is a pink W. However, there’s no pink on your screen. So, I would never think that it’s for your page.
-The colours of webager, are google’s colours (it would seem). They might get upset about that…
-The fonts on top of the page (“banner”) do not match. The “add screen” fonts, do not match the “keep your web simple” fonts for example.
-The English on the start/about page is not very good. You might want to get that sorted out too.
The above issues, make the page look a little less than professional. However, there are a couple of positives too.
-The video explaining how the site is used is professional. It ends a little abruptly, but it’s a proper video. Well done with that.
-The site is simple enough to use, so these issues might not affect the traffic you will get so much.
Good luck buddy!