Best of the kind .. with a small issue
The fade-in/out is a killer feature. Its so brilliant because it does not try to fight against our natural attemp of procrastinating breaks but give us time to fade out our procrastination. Other apps Ive tried (Windows/Mac/Linux) all took the "instant blackout" approach, which was too intrusive.
Right now I found an issue though:
If you have multiple desktops (created by Spaces), then the break cycle does not work if you are not on the primary desktop.
I hope the developer can fix this soon.
kakyoism about
Time Out - Break Reminders, v1.6.5