Did my first A380 flight a couple weeks ago FRA --> SFO on LH and loved it. Very quiet (I was in the forward cabin in economy), and the cabin atmosphere was about the most comfortable I've ever experienced. LH has a fairly sophisticated entertainment system for each seat, so there is no lack of something to do. Seats were comfortable (I'm 6 feet tall), too. Extremely smooth takeoff and landing (fair weather). It'll be a disappointment to ride a UA 744 back to FRA next month.