We have done several high profile cross-platform applications with Xamarin. As a user you can't really see the difference while using it. The most noticeable difference is that the app startup time is couple of seconds slower and the application bundle steals at least 10MB of app size. As a programmer the Developer Experience™ is a little rough around the edges with casual bugs. But hey you get to write your core business logic only once and in C#.
Here are some of the more visually appealing apps we've made with Xamarin:
Here are some of the more visually appealing apps we've made with Xamarin:
[1] http://valopilkkutaksi.fi/briefly-in-english/
[2] http://www.upmmetsani.fi/
[3] http://fair.online/