The best thing about team headquarters is that it has all of our project management tools in one place so we can use them together or separately as needed! I dislike how slow some functions are at times (especially when using Excel).
We have used this software for years now but recently upgraded from version 7 to 10 with no issues noticed by us yet. Our clients love being able to see everything they need right there without having to go through multiple applications just to find what they're looking for. This saves time and helps keep track of projects/tasks more easily than if each person was doing their own individual task lists.