I normally prefer buying products online and most of the time I will get my packages delivered through Blue Dart couriers. Also most of my my bank credit cards and statements were delivered by Blue Dart. The website provides proper tracking and gives the tentative delivery date, if we have the AWB number of the package. Till now I never find any issues with Blue dart courier.
The courier boys will be prompt and will give a call or miss you card if we were not available at the delivery location. The customer care is really good and will assist in case there is any delay in delivery or any other issues. I can say for sure Blue Dart is one if the Top Couriers in India.