I am using Reliance Netconnect+ data card for more than a year in Hyderabad. The connectivity is fast and speed is excellent. I have not tried it much outside Hyderabad except at New Delhi where it worked well . I have two more data cards of Airtel 3G & Photon+ for my work related requirement. Reliance Netconnect+ is found to better than other two data cards. I hasten to add here that my majority usage is within the city of Hyderabad.
Reliance however have much to improve on their after-sales customer support services.