Woohoo! Caltech has put the Feynman Lectures On Physics on a website for anyone to read for free. Maybe it has been up for awhile and I just hadn't noticed till now. When I was in college, I shelled out a lot of money for paper copies of all 3 volumes. I have hauled them back and forth across the USA on all of my moves since.
There are many virtues to these lectures. If you are bored in a more conventional introductory physics course, these lectures offer a different perspective, exposition style, rigor, and even topics than any of my other first year physics books.
One thing I love about these books is the cool side-chapters on topics that were not covered in my intro courses. A good example is The Mechanics of Seeing.
You can find some of the problem sets, that originally accompanied the lectures here.