That's your first paragraph. You have some errors in it and your first sentence is too long and clumsy. Split it up and make it smoother. I didn't look at anything past this. I'm not being mean, so don't think I am. Just giving you a heads up like you asked for. Try to write in short concise sentences. It's not only better writing, but it's better for your readers too.
Com - In order to really give an opinion, you need to state whether the articles are for SEO purposes or for visitors. ie. Did you request a certain keyword density (I bet you did ) If you did, they are pretty good although if your aim is for them to be a resource which brings visitors back, you would need to cut down on the density a bit. For Instance: is a lot easier to read when it is like this If you are trying to get an idea of the quality of the company that did the articles for you, you need to let us know what conditions you gave them. I prefer "Natural" writing over "Specified Density" writing but it really depends on what you are trying to achieve.
I argee completely w. ysf1... in that if something is not written "naturally" there is no chance of anybody reading it.