I am using Tata docomo from last 2 years in UP West. It gives 600-700 kb/s speed that’s good but not better then vodafone and airtel. but the cost of docomo is lower then vodafone and airtel . so it is good for 3G nd pocket friendly.
Also the tarrif plan of docomo is soo gud for local and STD. I like it soo much. But in roaming it is not better for net because the network of docomo is not good so it costes some money for using internet.