I had heard that Dnaa is very awesome in ISP category, but when I registered the installation took 3 weeks and after 3 weeks when my service was operational I had continuous break-down till a week. After regularly going to their office they took in to consideration my request and resolved it.
The only disadvantage is the poor engineering skills of the the technician and lack of technical support. The advantage is, u cant bet on You tube and google websites.awesome in speed for google and youtube. No speed for torrent