I like that it is easy for our users (non technical)to understand what each material category means when they are using materials in their projects/buildings etc.
The taxonomies can be difficult at times because of how specific some categories get but we have been able to make adjustments where necessary so far with no problems! We use this software as part of an overall project management system which helps keep track of all aspects relating to construction contracts such things as change orders or issues arising during worksite visits from clients / sub contractors.