I am not a consumer of jury consultant services. However, for the well-to-do client, who has money to burn, a jury consultant might be an expense worth incurring on a big case. If you cannot afford the high-priced services of a warm-bodied consultant, then maybe reading a good journal on the subject might serve your interests, as well.
The Jury Expert is a publication of the American Society of Trial Consultants edited by Dr. Rita R. Handrich. Dr. Handrich's goal is to translate social sciences research findings into practical and relevant tools for the trial lawyer. To that end, the journal features articles by academics on their research areas. The journal then gets reactions to those articles by experienced trial consultants who translate the theory into practice. Trial consultant responses to the articles focus on how the research can be used in litigation advocacy.
In addition to articles by academics, The Jury Expert also features practice-oriented articles by trial consultants on a wide array of litigation topics. The journal publishes six times a year and subscriptions are free. Their current issue features articles on cross-examination of narcissistic witnesses; juror reactions to successful women; varying attitudes of liberals and conservatives toward punishment; conceptual persuasion; the relationship between juror damages awards and generation; and more.