Always fresh and up-to-date first-hand information: where, what, how much)) where it would be worth going and where not so much, where to eat, interesting places unfamiliar to most, where discounts are at this time of the year and what promotions. Not everyone is fluent in German, sometimes it's like "Ausweis, handehoh, schnell, schnell!" Bottom line, if you don't speak German and you don't have much time, a personal city guide is your choice. Disclaimer: as a rule, the service is paid. Check out the price list and read reviews about the person.