Grabbed Ozone 7 Advanced (recently on sale) and it's turning out to be one of my best software purchases I have made in the last few years. I can highly recommend it if you're serious about mastering your own material. For a few years I used Ozone 5 on my Master Bus, then exported from Sonar to my final product. Now I'm finding I prefer to use Sonar Platinum only for the mixing . . . then export to 32 bit floating WAV, and then use the Ozone 7 standalone module for final mastering.
I hesitated about getting the "Advanced" version, but really like having the separate high quality plugins for use inside Sonar. For example: I put the Vintage Tape plugin on a poorly recorded / cheap mic vocal track and was pleasantly surprised how it quickly sweetened the track.
You owe it to yourself to download the demo and try it out, it's very easy and intuitive to get going right away because of all the great presets. The presets in Ozone 7 are now very clearly defined depending on how your project needs to be tweaked. They have greatly simplified the presets, and named them to describe actual sonic tweaks, rather than trendy and funky preset names.
One of my favourite new features is how they've now made the "bypass" button very easy to compare the "before" and "after" edits by keeping the volume the same ! So . . . you can make very subtle changes to a good mix, and really easily hear that you've helped it, and not wrecked it.