When you are looking for free Joomla templates, there are a few things that you should bear in mind. The problem with free is that people are less likely to put in the work for the design. This brings the problem that there is also nobody around that is willing to fix the problems.
Free themes tend to have breaks in links or cause a few errors here and there. This can damage your website, especially if you are running a business website. The blame will be put on you and not on the theme that you are using. Because of this, you will lose traffic to your website and lose potential customers and clients.
You should test all aspects of a template before you decide that it is the theme for you. While you may think that it works just how you need it to, you may find that the most crucial link is not working, such as the link to the checkout of your website.