It's great that you're learning with your kids. I really believe the most powerful way to teach your kids that learning is important is by learning with them. You should be proud of yourself for taking a chance!
I like the students to know what I am looking for but the rubric is vague enough that students can still be creative.
I feel like at first it can be used just as professional development. That sounds so blah though, so I guess you can think of it as finding interesting stuff regarding technology that will positively affect the way you teach. I think its beneficial even at the level of just being exposed to new, cutting edge, technologies.
Dosen't this make you wonder how many things in life you may have closed your mind to before it them a chance. We always push our kids to "give it a chance, you might like it!" There are times that I need to remind myself of the same lesson.
One of my favorite features is the ability to create multiple identities.