I installed the free trial on my iMac. I also have Luminar 2018, which I purchased. ON1 was much, much faster in opening RAF files than Luminar. The one thing I don't like about ON1 is that it doesn't have a history list of edits, so you have to undo edits sequentially. Luminar allows you to go directly back to a previous edit, which is a feature I like. Lightroom has had this feature for years, and I use it frequently. I don't know how many other image editing programs have this feature.
The initial RAW conversion for ON1 seems to provide a nicer starting image than either Lightroom or Luminar. The exposure and contrast seem to reflect the actual scene more accurately. The latter two programs provide a duller image, but of course those can be adjusted.
ON1 has lens adjustments for a lot of Fuji lenses, but it didn't seem to have one for the 90mm f/2.
If you decide to uninstall ON1 from a Mac, the uninstall utility that ON1 provides leaves lots of files and folders behind. I had to uninstall them manually.