Abstract: Neurolinguistic programming (NLP) is a set of techniques designed to make you better at what you do. NLP helps you to understand yourself and others and teaches you how to communicate effectively with others in order to build better relationships with them. Reports on a longitudinal study of the effect of a two to three day NLP course on managers and staff in the hospitality industry. The evaluation is unique as it is the only known longitudinal research into the effects of NLP. Measurements were taken on four psychometric measures at four time periods. The four constructs measured are all positively linked to performance. Three show increases over the start of course measure. Self-efficacy does not. The verdict on the efficacy of NLP is unclear. Draws some conclusions on the extension of the research.