Good agreement with what you can see in the sky itself, thus an excellent guidance and who is interested in star data information will also comprehensively. Diverse switching options to show / hide information (eg, names of constellations, div. Presentation filter). Free setting for observation time / place of birth and the compass. Timing can be stopped and put in various speed steps forward and back; the sky view then runs like a movie. Helpful and powerful zoom for any part of the sky. All around recommendable for ambitious stargazers.