Background: Research suggests that the use of team formulation within mental health services may improve staff understanding of service users' difficulties and increase team empathy and reflection. The aim of this evaluation was to investigate staff perceptions of team formulation within an assessment and treatment unit for individuals with learning disabilities. Specifically, the authors aimed to investigate whether staff found team formulation helpful and whether staff felt it impacted their work with service users. Materials and Methods: A survey was completed using a cross-sectional questionnaire design. Twenty-eight staff members working on the assessment and treatment unit were asked to complete an anonymous questionnaire about team formulation meetings. Results: The response rate was 54%. The majority of staff agreed that they found formulation meetings to be helpful (80%) and that formulation meetings positively impacted how they work with service users (86%). The most common theme arising from staff responses concerning the most helpful aspects of formulation meetings was "gaining a greater understanding of service users." Conclusions: The findings from this evaluation show that the majority of respondents felt team formulation was helpful and had a positive impact on their work with service users. These findings support the use of team formulation within mental health and learning disabilities services. Future research could investigate the impact of team formulation on service user well-being and outcomes.