The main drawback to using free Web design templates is a lack of originality. Since the templates are widely available, your Web site will look similar to many others. Additionally, there is a slight possibility you may choose the same template that one of your competitors is using. To help compensate for this disadvantage, you may want to consider altering the design of the template slightly. For example, changing the background color or using a slightly different font for the text on your pages can help your business develop a more distinctive online presence.
Another disadvantage is that you may be required to provide a link back to the site from which you obtained the template. However, depending upon where the link is located, you may decide this isn't a significant concern.