Very well done
This is a very nice app, which does its job well.
One issue, though, is that it doesnt offer the option to disable breaks while specific apps are in the forefront, so youll end up getting "breaks" during presentation or gaming sessions, where you might not want them. But thats an easy fix, and once thats done, this is my favorite RSI prevention app ever.
FrequencyAndSulphur about Break Reminder