Worked fine for me!
Im not sure exactly what the previous reviewers were doing wrong, but this app has worked perfectly for me (Im running it on 10.7). This app does exactly what it says it does. I have not tried syncing with TripIt (which you have to pay for) or the iPad/iPhone apps but will in the future.
I rated this App 4 stars as I feel it has a few nice features including adding notes to your trip, interactive maps, and intuitive flight searching. To me, improving the UI polish, the ability to automatically add ical events, growl support, and more preferences/customizations would make this a stellar 5 star app.
The thing I like about this app is that its not only great for tracking your own flights, its extremely useful for tracking family members as well.
FlyinRyan7 about
Flight Status