The ability for my team to have access from anywhere at anytime with no need for additional software/hardware makes this tool extremely useful! I wish it was more intuitive but once you get used to how things work there's not much else needed (other than maybe some training).
We use Plandays as our main scheduler which allows us to track everything we do internally including time off etc. It helps keep everyone up to date about what they are doing every day through daily emails & weekly updates via Slack messages.