It's simple but powerful - I really enjoy using it as an employee because my manager can easily check up if any employees are absent or not available during certain days/weeks without me having access their calendars (which would be quite difficult).
Sometimes when we have some issues that need solving urgently they don't show us until later than expected so this could create confusion sometimes especially at times where there isn'r enough staff members around which causes delays etc., however i think these things will improve over years once our team grows bigger since now its easier just by looking into someone elses calendar rather waiting till next day before showing them what needs doing :) Great tool!! Its saves alot o work from managers who usually has hundreds+ people under his care every week plus he also manages holidays too :D.