I am not a ABC Broadband customer, but still experienced Best response from them. When I registered for new connection, immediately next day the sales person came and gave me information about their services. It was useful and perfect .
Then he checked network from my terrace but network was clear so unable to take their services. So I took MTNL, and it took them more than a week to provide connection. I am very much impressed with ABC Broadband for their quick response and affordable plans.