What does Slack do well? Slack is a great solution for organizations that have dispersed teams or contributors that needs to stay connected. You can easily set up custom themed rooms, chat, send files, and integrate the platform with various apps.
What does Slack not do well? Slack is very polished but it would be great if the UI incorporated custom themes to ensure each user could have a unique look and feel within their chat experience.
What do you wish you had known about Slack before using? I wish I knew just how many apps could be integrated into Slack (Google suite, etc). Once apps are integrated the platform becomes much more valuable and useful for business users.