This article considers the pros and cons of using Method of Levels (MOL), a therapy based on Perceptual Control Theory (PCT). Five concerns about PCT are that it is an early theory, is not well known, originates from outside psychology, implies that established theories are inaccurate and has a mechanistic approach. Five positive features are that it explains how ‘control’ works, takes a phenomenological perspective, is grounded in biology, integrates many disciplines and has an evidence base. Five features of MOL can raise caution: it is not well known, emphasizes intrinsic change, requires the therapist to let go of control, concentrate intensively and use alternative evaluations of outcome. There are major advantages: it is a simple process to learn; theory-practice links are clear, it is ‘ultra cognitive therapy’ – focused on the present moment, client-centred and enables shifting in perspective, promotes service empowerment, and has an evidence base. This article will help therapists make an informed choice about using MOL.