The instructor pulled packages of the pipes we would need off the shelves. He showed us how to apply plumbers putty and silicone to all the right places. It was much easier (and less expensive) than I thought it would be.
He took us through all the steps, gaskets, and how to change out the pipes.
I am pretty confident that in a pinch I could put in a whole new vanity by myself. I was surprised how easy it was to do, compared to how complicated I thought it would be. The whole class, plus all the questions we could come up with took just under an hour. If you are ever interested in taking their free classes, I would highly recommend it!