I was taking flight 3K687 from Singapore to Kuala Lumpur on last Sunday (15/12).
Here are the bad experiences I had from JETSTAR:
Cleanliness - I believed someone was vomited on the toilet bowl cover and it was not cleaned properly. The smell and stain were so visible once you have entered the toilet.
Flight attendants' Attitude - In service line, we should know the terms 'Customers always right'. I saw it with my bare eyes that a flight attendant was speaking rudely to the passenger when he purchased a cup of maggie mee during this short flight. The flight attendant warned him the landing time is left 30 mins and asked him whether he still insist to purchase it. That's RUDE!
Flight Schedule - The arrival time has been delayed ONE hour without informing. Unlike other airlines, any delay they will keep updating the status to make sure the passengers aware of it.