Gee, I wonder why this topic has never been discussed before...
John, if you search the forum you'll find that Ozone has been extremely popular around here for at least the last 10 years. I've been a fan since Ozone 2. O3 was a big step forward but each subsequent revision offered smaller and smaller incremental improvements, to the point where I refused to buy O5 or O6. And eventually switched to a mostly FabFilter mastering chain.
But last fall iZotope made us an offer on Ozone 7 that we couldn't refuse, and boy am I glad I took them up on it. Golly gee whiz, it's good. Sorry FabFilter, but Pro-L has been demoted to track and sub-bus duties.
Even during the years that I had abandoned Ozone, I still routinely recommended it for novice mastering engineers because although you can achieve similar results with many other products, nothing is easier for getting good results when you're really not sure what you're doing.