I love the cloud-based interface that helps me remind staff when they have a 15Five to complete. I manage a remote staff -- none of my employees works in my state -- so it's critical to keep tabs on morale, issues and to keep people's spirits high by reminding them of that awesome favor they did me earlier in the week.
I don't find the "pass up" functionality to be very intuitive. I have sent comments that were intended to be private to the wrong person, for example -- it's not the easiest to figure out.
Explain to your staff that this is a tool designed to help them share their wins and losses with you, and also to help identify problems before they get big. The "but this is going to take time" argument is always there, but I think once staff realize how much conversation it saves down the road, they'll be fully on board -- mine was.
We are identifying communication snafus before they turn into problems, and it's forcing us to think more clearly about the opportunities and threats in the industries and how we can do better.