I seem to have great problems with this tutorial. And not that it actually does not help me with why and how I should use it in different scenarios (wich it doesn't), but my entire computer crashed for the first time. Got a major error, lots of blinking on the screen and the had to reboot several times. When I tried open it again, chrome crashed every single time. Not impressed.
Can very much recommend the Udacity's courses. They are well planned and a big plus is that the homework spans from quite easy task, to some rather difficult.