Well-designed Project Management Tool for WBS, Gantt and Kanban

I've used GanttPRO for both commercial and academic projects in pharma, life sciences, consumer goods, and other sectors for projects ranging from $100K (departmental) to $11M (enterprise). It has all the critical functions needed for complex projects without the bloat of tools like MS Project. As a pure web-based tool, it's ideal for WFH and geographically disbursed teams. It includes a complete WBS with custom fields, Gantt and Kanban views, so it's suitable for both Agile and hybrid methodologies. The UI is flexible, extremely responsive and accurate (drag n drop task restructuring is easy). Full support for scheduling, resource management and budgeting. My decision to go with GanttPRO was based on its clean and consistent architecture - unlike most PM tools that have limited WBS hierarchies, drag n drop and user customization, it's obvious that GanttPRO has a scalable architecture that will support ongoing enhancements.