If you use a product roadmapping tool in conjunction with a project management tool
Use your roadmapping tool to get customer feedback and prioritize features, issue trackers for engineering task management
Fable is used in addition to both tools, providing a great collaborative arena for all stakeholders
Your roadmapping tool lacks a meaningful collaborative surface for product definition, risking a feature-factory
Feature-factory workflow mitigated with use of Fable to define the product
Two-way integration is difficult to set up correctly
Two-way integration with your issue tracker is simple to set up, and issues are creatable and embeddable in Fable