I liked that we could get an overview of our progress as well see where work was done or not yet started so far into each iteration/phase which is really helpful when managing change requests within sprints! Also having milestones per phase makes it easier to set up expectations during planning meetings with clients / stakeholders because they can now clearly visualize what's supposed "to be" finished by this point - before starting their first task.
Nothing much but you know there are always things to improve :) This tool definitely helps us keep track how different phases go hand together while also creating realistic estimates throughout all stages until final release date completion! We're using these tools mainly at Sprint level however some features like linking tasks between iterations would have been great if possible too since sometimes one has no clue about whats going on without looking through several screens ;) But overall everything works fine :D The UI needs improvement though. It should look less clut.