MTNK's service in mumbai is excellent........i remember back in 2005 when the rains splashed the hell out of us.........their broadband got back within 3-4 days and never ever did it dis-connect for next 3yrs that i lived in mumbai..when i shifted in delhi,i contd with mtnl but my experience with them was very poor...........for 2mbps connection i never got more than 512kbps and there were frequent cut-outs.......after 2mths net would be dis-connected for most of the day and i was still billed for entire amt..........i got fedup and switched to Airtel and i am happy with it ever since.........Delhi bole to Airtel!