It works well, but gets boring after a while... I've found it works best when you're drowning under a sea of small tasks.
In my opinion, no self-help guide applies for everyone; we all have our own strengths and vices.
It seems that this one is designed to help build concentration and minimize interruptions by defining concrete "work unit" blocks, thus helping to build discipline in fighting off distractions (internal & external).
I don't feel strongly about his views on the perception of time, but it's not that important to the whole article.
Well, in my case, when I'm doing a long task that I enjoy I tend to enter an obsessive mode that's far more productive if uninterrupted.
This one seems to work particularly well for me precisely beacause my perception of time fits better with the sequenced than the abstract. I also dislike multitasking and I've been practicing concentration exercises and catching internal interruptions outside of work anyways. I can leverage a lot of things I already do. Not everyone is going to be able to do that.