The ability for my team members in different locations (in our case India) can work together seamlessly without having any issues or delays from time zone differences! We are able use this tool as well have live meetings that allows us all be connected even if we're not physically present within each other's offices/homes etc..
There isn't anything I dislike about using celoXIS but there could definitely always room improvement by adding more modules like chat which would make things easier when you need quick responses while also being available via phone calls too!! This has been an amazing asset since day 1 & helps tremendously during times where everything else fails.