Hi,
I am using SBI savings account for last 3 years. The over all experience is very good.
There was one time when SBI was slower than private banks in all fields. But today they are providing good, fast & cheap service as compared to other banks.
Internet banking is awsome..
I have used internet banking of other 2 leading banks but SBI is better than them and also very secure.
There might be some problems with the employees in terms of speed & behaviour but all this varies from person to person.