Seconded. I've used Slack at two companies, both with a small, single-purpose team (< 10 people). In each case I and the other users were quite happy with the

Seconded. I've used Slack at two companies, both with a small, single-purpose team (< 10 people). In each case I and the other users were quite happy with the features available, and the overall design of the app. It isn't for everyone, but I whole-heartedly advocate teams examine Slack for their communication needs.