I like how simple it was for me as well my team members, once you get into using Sequence diagrams things start becoming clear very quickly! The tool itself takes some time getting used too but when everything starts making sense its not long before your are fully upscaled with all of this software's benefits (in terms of ease etc).
Sequencing in general can be tricky depending if there have been previous versions or other people who might've done their own work/changed code around previously - so thats always something worth thinking about upfront which would lead back towards 'what problems do we actually want solved here'.