I am a teacher with ADHD, and have been reading about Time Timer for years, but finally decided to take the plunge. I'm so happy with it, I now dutifully shlep it to and from school with me in my backpack each day. Thankfully, this edition seems sturdy enough, and is surprisingly light! It helps me visually track the progression of a class period, and whether I'm working on soul crushing administrative tasks like grading or paperwork, or diving into hyperfocus while designing a project I'm excited about, it helps me get started and track my progress (like, OMG, I had no idea this task would take 3 whole time timers!). Highly recommend!