The ability it has given us in being able to have more control over our volunteers at different stages during an event or race weekend! It's been great that we can now log people into sessions/groups as soon they arrive so there are no issues with them not knowing where their session starts etc - which was one problem I had previously when using other programs like MS Teams & Google Hangouts.
There isn't anything specific i dislike about this software but would say if you're looking to manage your team members throughout multiple days then this may be better suited than others out there. We've used TRS since 2016 (first year) and have seen many improvements from 1st version to current versions. Our organisation runs around 100+ races annually across Australia, New Zealand & South East Asia.