A recent incident in SG airport.
Took Vietjet, was in a queue at check in counter when a VN ger angrily complaining to his SG bf... The VN ger was saying something like, "Vietjet dun allow her hand carry to be brought to the plane cause too heavy." She repacked her bag, passing some of the items to her bf. She tried to weigh her bag and still over weight... this time she gone mad and screamed at the check in counter staff something like, "Why she came to SG via Jetstar, she dun face this problem?". Kept shouting to her bf too.
Personally, I am surprised that most air liners dun follow the policy of hand carry luggage. I find it a good policy for Vietjet to weigh hand carry. A lot of passengers want to save a few dollars, do not purchase check in baggage and hand carry huge bag into the plane. (I know some will think it is budget air, so save as much as possible. )
Review of Vietjet, on time took off... quite new plane. Air steward/stewardess much more friendly and more smiles compare to Vietnam air. Worth the money spent and the timing of flight is good.