The fact that it automates starting discussions about what can sometimes be hard topics. We ask about challenges and frustrations, wins, and general checks on overall happiness. These can start conversations that we can follow up with in person.
It's not super intuitive how you change questions as an admin. Additionally, if you submit your 15five late, it can often get logged as being for the current week, which is frustrating.
It's tempting to ask a ton of questions, but this dilutes the quality. It's also best to ask some open ended questions.
This helps facilitate 1:1s and sets the agenda for what we plan to talk about. It also frees up time in those meetings to discuss important things rather than updates on tasks.