I AM concerned about the poor services provided by CMB. The CMB buses are old and dirty. Some of the seats are dusty and sometimes you find someone has left gum on a seat. There is often litter on the buses. Also, CMB never seems to have enough buses. It is difficult to get on a bus during peak hours, because they are so overcrowded. I always find myself having to wait a long time for a bus and this can be uncomfortable during summer when it is hot. Some drivers drive their buses at speeds which I consider to be too high and some are impolite to passengers. I am very unhappy with this attitude. NICOLE LEUNG HO-YAN Taikoo Shing