Lists: Check-ins pop-up comments box

Just wanted to voice a positive note for the feature labeled Beta:
On a title page >  Share > CheckIns, you currently provide a pop-up box to add a comment while adding the title to the CheckIns list.

I'm finding this very useful. I hope it will lose its Beta status and become permanent.

It would be even more useful if, when I return to the title page, and go back to Share > Checkins, the comments I had previously entered were displayed there.