How can I judge the quality of a particular Mindfulness course?

Although currently there is no formal accreditation for Mindfulness teachers, it is highly recommended that teachers embrace Mindfulness in their lives through daily practice. They should also have completed a Teacher Training programme at a Centre of Excellence such as the Oxford Mindfulness CentreBangor University or Exeter University, and a supervised pathway over at least 12 months as described in the guidelines found at Mindfulness Teachers UK.