@rptechindia: As I indicated at the beginning, people have different experiences in different regions. I have been using Speed Post almost from the time it was introduced, not only for eBay purchases, but also wherever possible.
I have been wholly satisfied with SP except that it's sometimes delayed, especially in the rainy season when flights are cancelled and surface transports suffer from floods. But this probably happens with all couriers, particularly for delivery to remote areas like mine.
OTOH, my experience with well-known private couriers have not been satisfactory at all.