I have already started using it so that I don't get so absorbed on Facebook or my writing. It has certainly helped me to be more efficient instead of aimlessly scrolling through Facebook as I keep my eye on the time trying to fit as much as I can in the time frame.
Hyperfocus and Aspergers
Edited to add this image and a bit more information.
The above image is from Karla's ASD page.
Using this timer helps me because I can see it. I know it's there. When I set it, I can hear it clicking for each second, reminding me that I am on a time limit. It actually helps me manage my time more efficiently because I can hear it clicking. It stops me from becoming so hyper-focused that I lose track of everything. I set it for about 25 minutes. I can get quite a bit done in that time.