I wanted to use groups to set up undergraduate and graduate groups for certain assignments, since my course is combined. I wanted to have the ability to grade individually. The problem is that when one student uploads their assignment, it propagates everyone's portal. The next person uploads their assignment and it overwrites everyone's assignments.
I also wanted to use this feature for design critiques, as I did when I used Blackboard. It does not work in the same way. Each member's project overwrites the previous one.
I have had to go back to using discussion boards for critiques. Very discouraging.