Ctrip's mobile app is an abomination.

Following is my bug report:

-a credit card that expires at the end of the current month is not okay
-for my MC, any expiration months that aren't at the end of the quarter are not okay (the work around to this is pretty easy)
-they only display 2 or 3 out of ~15 flights on your route (the good news here is that the 2-3 flights have always been optimal in terms of price/schedule)
-it's often impossible to select a traveler

In closing, I still like the app, but their QA sucks big time.