
Sakai is an open source LMS, which means that there are many, many people who care about its quality and functionality -- people who work in higher education. The people who build Sakai are the people who use Sakai. (Contrast this with commercial LMS where the system is build by programmers in a back room somewhere for profit.)
That said, Sakai has a wonderful open architecture that is pedagogically neutral. Instructional designers and instructors can place whatever tools are appropriate for their teaching, and, more importantly, for their students' learning, into a course. The tool pallet for Sakai is extensive, with tools for communication, administration, collaboration, and more. Sakai excels most of all, perhaps, in its ability to build collaborative working and learning models. Review collected by and hosted on G2.com.
In an open source world, one has to get used to a rather broad range of opinions about what the system should look like. There may be less of a cohesive design strategy. That said, however, I've seen an awful lot of commercial products (and some open source ones as well) that have just as much, even more, lack of cohesiveness. Consider a certain commercial product that seems to enjoy acquiring (and suing) competitive products and then "integrating" them into its architecture. The design strategy of acquisition and stitching together ends up with more of a patchwork quilt than a consistent design. Sakai certainly does NOT have that problem. Review collected by and hosted on G2.com.