After looking at the website, I like the style and the clean cut design. It is very professional looking, which I assume since it is a business it is what your aiming for. I cannot find anything majorly wrong with the website.
One tiny issue is the siteground.com ad on the left of the main index page text, it pushes the text to the right and looks slightly out of line. Also, I'm not sure if like the three main buttons on the index page, but thats just personal oppinion. On the "VENTA DE SUMINISTROS" page there is a green button, the text before the hover state is the wrong colour. I think the button colour which is grey should be something like black or white, or something that helps to stand out on it.
Other than that, looks great!