Always have to wait in queue from quite early in the morning (some even come around 6:30am) and as people start arriving late, they tend to break the queue.
My two stars are for the staff who could come a bit earlier (say at around 8am) to cater to the customers. They can take rest of the day off to compensate.
Also if there is some kind of numbered tokens so that some people who arrive late (say 9am)would not have to wait in line, finally to realize that there is no LPG cylinders for them.