Came through on way to Vienna. Flight and gate info clear on electronic boards. Ask questions in English if necessary. Don't give up first time you get a growl. Use Sky Trains to get in between terminals. Use several escalators they simplify things and there are friendly people to advise the way. If you have a boarding pass printed for your onward journey that was printed outside of Frankfurt go to the Lufthansa help kiosk and have a local one printed for all Schengen trips if possible. There are showers reasonable price reasonable wait. Food courts very good. Shopping ample. Go through gates as early as possible. Don't take liquid through. Buy coke water etc at boarding gate vending machine. security take off belt all metal in tray or bag to be scanned shows will be checked. Will always try to go through Frankfurt even at a higher cost.