Users play a key role in many training strategies, yet some organizations often fail to understand the users' perception after a simulation training implementation, their attitude about acceptance or rejection of and integration of emerging simulation technology in medical training (Gaba, 2007, and Topol, 2012). Several factors are considered to contribute to the acceptance level of simulation training by the users, including cost, the existing training and certification policies, technical issue, realism of training, values of it, concerns about it, and its effect on the patients outcome, and medical errors (Clever, 2011and Dawson, 2006). An often overlooked factor in the success of a simulation training merger is the impact on the users and medical profession (Dickemen, 2007). This qualitative phenomenological research study explored the lived experiences of a purposeful sampling of medicals simulation training users in the decision and none decision making roles, who had been involved in simulation training at least for one year. The study obtained their perceptions, their lived experiences, feelings associated with the experience, and interactions. And then how those feelings, perception, opinions, attitudes, and interactions evolved. Data suggested that the presence of feelings attached to experience, preconceived views, existing training policies, affect the level of effectiveness, users' view of its outlook, impact on the decisions, and the medical profession. In addition the users' perception, beliefs, and feelings all affect the interpersonal dynamics, interactions, communications, of simulation training users during adoption of simulation technology and its implementation. Understanding the medical simulation training phenomena through the understanding of users' perspective can redefine how they communicate, interact, share, learn in simulated environment, and from one another that help with the subsequent additions and modifications to the existing simulation training strategies. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]