I have been using Unfair Advantage in a CrossOver WINE bottle for over six months. It works without a single hitch for everything that I have asked it to do.
The data downloading and portfolio management work as expected. I've never really been a fan of their charts, however, I have seen no problem with their charting at all. I have not tried their built-in programming language, because I've never like it and I have other tools that I use. (Their data quality is superb, by the way - unparalleled in the industry, as a matter of fact.)
The most exciting thing for me is that access to their data through the API is FLAWLESS on CrossOver. FLAWLESS!!
As I said, as far as I can see, this program runs exactly as it would under a real PC.
Matt