HI personally worked on it while I was at Pivotal Labs (RIP). I loved that the point was to get in, add some stories, aka "bookmarks for conversations", have it opinionatedly setup your sprint by averaging the last few sprints worth of points, and then you got out. I use other tools now and I cringe every time at the complexity. I don't want a swiss army knife of features, I want a tool that does exactly what I need and I don't have to spend hours grooming and configuring and tweaking. Tracker hit that sweet spot.