Six months ago I signed up for the BSNL Broadband Internet Home 500 Combo Plan. While the bandwidth and speed offered under the plan have been decent, all my interactions with the State-owned BSNL staff have been unpleasant. The unhelpful local Help Desk, lethargic Billing clerk, tip-seeking Linesman, and the discourteous Customer Service personnel (Helpline # in Hyderabad - 12678) were painfully slow in discharging their duties and tested my patience to no end. They are all yet to get over their bureaucratic mindset.
I paid Rs. 1500 (deposits for the Landline phone & Broadband Internet service) initially. The monthly charge is Rs 629 (Rs 550 for the Internet + 60 for the Modem monthly charge + service charges). If you pay your bill online on their sloppy & extremely amateurish website, you get a 1% discount.
Never mind if perky Priety Zinta swears by BSNL Broadband in the ad (she is paid to act), go for BSNL Broadband only if you can endure bureaucratic behavior.