OER Materials Drive Student Engagement and Savings, Study Finds by Meghan Bogardus Cortez
There is much work to be done in researching both the benefits and the downsides to OER, but I feel like the largest hurdle will continue to be convincing faculty that it does not necessarily need to be more work to utilize OER than traditional textbooks.
However, that requires work from the community to collect and review materials already available.