like lusitano said, almost every service in qatar is of poor and subsandard quality. Karwa of course, takes the cake. It is the worst taxi sevice I have seen on planet earth so far..and i have seen taxi services of undeveloped countries like kenya, nepal, tanzania etc. I have never seen a service where you require 18 hours to book a taxi, and that too will hardly ever come on time...usual excuse for being late "traffic". Usual excuse for not having a cab a time you need "no cab is free".