I wouldn't do it at SIN or CAN.
CAN is the worst (esp 02) as ATC doesn't give you any hints
as to its vectoring intentions. There you are all on profile for
what you think is an intercept of the LLZ - you've pulled a
bit of speedbrake earlier, TCAS looks logical - then he takes
you through the LLZ and puts you downwind for another 20
track miles so he can get the local boys you don't see behind
you in first.....
Other times he's kept you way too high, so much so you are
expecting he'll obviously keep you on a present perpendicular
heading. Then the bugger suddenly turns you onto a 30 deg
cut and tells you to drop to 900M - cleared for approach!
