Just so you know, I'm writing this critique whilst viewing your image here, and the live version. I'm using Google Chrome.
Don't feel bad about the low originality score which I've given you. In my eyes, it's very difficult to make something unique for websites now-a-days. Everyone's fallen into a set way of thinking, and very few are wanting to break out of that box.
The navigation at the top is clean and simply, which is nice, but is it necessary to have the pop-up box when the link is hovered over? We can see what the link is called.
I'm not sure that I like how every link has an underline when you hover over it. Whilst it's traditionally used to indicate a hyperlink, I think you've overused it; this is especially apparent with your two footer links at the bottom of the main page. Is it really necessary to underline the entire text there?
The banner image is nice, and nicely coloured, but the shadow makes it appear curved, and with the help of the grassy knoll, appears to be indented in the middle slightly. Not sure if this affect was intended, but to me it looks rather strange.
Overall, the design is clear and crisp, and very user friendly. Though I really think there's too much underline.
Trying to be a little less lovey with this one I'm afraid, so this might sound a little harsher than it really is
Starting off - originality. I'm in the market for some designs myself for a new portfolio site I am about to do. I must say that while the design you have there is pleasing to the eye, crisp, clean and very functional. I think it's a little to 'generic' for my tastes - a lot of personal opinion in there though!
Vision. While not speaking Czech, thus unable to read the wording, from what I can see it's shouting business, and if this is indeed what it is, then mission accomplished in my eyes. It states you have a company and you want to do business, no one can ask more!
Technique. Simply 5! I love the way CSS can do wonders for layout nowadays. I haven't put fingers to Dreamweaver etc in years now, concentrating more on the photographic side of my life, but I must say that I like the style, and like the smooth crisp lines!
Impact. 4.5 - seems to do what it needs to do - and for a lowly me just browsing through critiques, this one did indeed jump out at me so again you have done well there!
All in all i give 4/5 - shame on the low Originality but there we are, We're all of our own opinions but please don't take the 2/5 as a bad mark, just seemed a bit generic for my tastes