Fantastic shot of pugsley. I have the 70-200 f/2.8 ii but that sharpness beats it. Seems to me the advantage of the 200 f/2 is that you are potentially getting three lenses in one: a great lense for indoor sports or low light photography, a good portrait lense and with an extender a more than adequate medium telephoto (up to 400mm f/4) for outdoor sports shooting.
Thanks! Yes, it is a very versatile lens; however, its only weakness is its weight. It can become quite heavy after several hours of hand-holding.