Very nice
You don't go into much depth, but you make up with the shear size of the tutorial, which makes it very usefull.
I am begining to think it is some unwritten rule that I do not have access to for people to put music that you can't turn off in tutorials just for the fun of listening to me scream that I can't listen to my godsmack while reading, and for someone making a tutorial about buttons one would think you might have put a "music off" button. . . please. . .