The author has done a nice job in designing a clean UI. But its so clean and spare, that a user may be a little lost on exactly how to use the app. It could be made a bit more intuitive. The most problematic aspect of the current version is that it is buggy to add new panels, and it does not appear you could remove a panel once created. These are issues that a thoughtful developer could spot and fix in testing. As I said, the app has potential, I want to love it, but not with the bugs.
LeggattNYC about SG NextBus, v3.1.1