Once you've reached a point that you are comfortable with the process you'll find that you can do it anywhere because you remain focused. You know when you're really distracted... nothing is making sense and nothing is sticking and for some people, used to studying in noisey classrooms, silence becomes a distraction because the background chatter has become an anchor to the minds study mode. It could be because the school was situated in a noisey environment.
If it works for you go for it. I suggest you also have fun with the time saving of spending only 15 minutes doing the superreading and mind mapping rather than 40 minutes to an hour because of the frequent distractions from time to time. 
Alex
