i flew MAN-HKG last year on CH and everything was fine, we were delayed out of MAN but the A340 was waiting for people apart from me! in the end however, we got to HKG ontime so nothing wrong with CH.
although going through ZRH security was quite embrassing in that they thought my scanner was a bomb detonator!! they actually pulled me aside and going around their team asking if it is ok. in the end i dont know why, they just let me go, i thought they was going to take it apart