The Class of 2016 did this and it was super informative so:
It's still early, but there may be some ED and rolling admissions folks who have already made final decisions.
It's up to you how you post, but it's very helpful to the kids coming up if you state whichever of the following are relevant to you:
Then you can add a few sentences about how you (or your kid) reached a decision. I know we followed these kinds of threads very closely when my D was making her list, and now the Class of '13 can make the same kind of contribution for the years ahead.
Whenever someone is ready, start us off. There doesn't have to be any cumulative list for the posts, just your own status.