I think several users on this board will disagree with this honourable mention.
Let's face it: It is a ported windows app, Mac users are accustomed to something different. Windows has a different user interface than Macs so it is always a bad idea to port an app between two different operating systems and keeping the user interface mostly the same.
If some customers are fine with the different user interface, the app should at least work as expected (especially after 3 major updates and for 40 US$!).