Yes, voice writing is very competitive. Why?
one-stop-shop. All the necessary editing of the transcript to verify it is 100% accurate can be done on site, or at a remote location, using the same software that produced the transcript. The system (1) produces the transcript at the time the words are spoken; and (2) digitally records the meeting. Because there are no third party typists and other overheads involved, costs can be kept very competitive.