Open education is wide ranging and all encompassing: from informal Ted lectures and Youtube type videos through to Open University, Coursera, MIT and Harvard open courses. My own experience of formal open education (other than the OU) was on a Coursera programme. It consisted of several video lectures utilising open source software programmes (Music) to demonstrate examples and for individual intersessional tasks.
Advantages: Flexibility - can access the videos at any time
Clarity - the information followed a coherent sequence, tasks were relevant and
challenging but within Vygotsky's zone of proximal development
Scaffold - the online forum allowed for programme's learning community's support
Pedagogy - only Behaviourist through instructional videos
Production - presentation can be rather dull and
Accreditation - no recognised accreditation for completing the course, no pass or fail.