I write a fair bit about Sakai 3 because I am excited about the possibilities for change that it represents. That said, there are a couple of points worth emphasizing. First, Sakai 3 doesn’t exist yet and won’t be adoptable as a full LMS for a while. (See Sakai 3: What It Is and When To Move To It for details.) Second, Sakai 2 is a very good current-generation LMS that is meeting the needs of many schools today.
University of North Carolina, which has been piloting Sakai 2, has been putting out some excellent evaluation materials on it. (See UNC’s Sakai Evaluation Results, for example.) Their Sakai pilot blog also contains some gems. For example, they have identified five “big ideas” that they believe represent some of Sakai’s strengths—particularly in comparison to Blackboard, their current LMS. Here is a video describing the first of those ideas:
In addition to the school-wide evaluation, the UNC medical school has been looking at Sakai to meet their more specialized needs. (See Academic Study of Blackboard vs. Sakai at UNC School of Medicine.) They have some niche requirements which are critical for them, foremost of which is a good calendaring system. Here’s a video of medical school faculty talking about how Sakai works for them: