Hi Sven,
I can't complain about the UI. Well structured, easy to handle and nice design. You have a home screen, where the icons will lead you to the recommendations and general information. The second main screen is the menu screen, which leads you to every useful function, like telephone, wifi, navigation etc... I liked that everything was connected, in example: I watched the video of Man Mo Temple and by one click I was in the navigation system, seeing my current location and how to get to the temple.