The better the tool is, the better the end result will be. Mastering is an art and if you are a mastering guru, then you can produce a good master with almost any tool but most of the people that I know, producers, musicians and even some studio technicians, are not so good on in the field of mastering, at least without having a good “all in one” tool. In times past I did my mastering with T-Racks, then with Maximus, and now I have switched to Ozone. For the rest of us, a good tool is essential. If your a master at mastering, you can probably get good results with any tool.