I use ozone 4 and it is very easy to use. It is worth every penny. I am planning to upgrade to Izotope Ozone 5. I understand they made improvements in a lot of their algorithms. The user interface is also upgraded with a little more felxibilty. Again very easy to use. I am not a trained master mixer but learned a lot be just taking a wave and going trough to see what each plugin does. Just play with it, the learning curve is very easy and again worth every penny. You will be surprised how you can take a mediocre recording and turn it into something special.