I am somewhat hard of hearing and some voices do not register well for me on the telephone. Once I called Tech Services for my DSL and got an Indian lady whom I could not hear well. When I explained this to her she kindly switched me to another technician. On another occasion, however, I simply could not understand the Indian man who answered the phone. His accent was so thick that I asked for him to transfer my call but he took offense and refused. Rather than argue with him about it I simply disconnected and recalled the number, getting somebody that I could understand.

By and large I've had good experiences with calls outsourced to India.