Sharon,
looks like the lens is both very sharp and has nice bokeh on the out-of-focus background. The headshots are very nice.

That type of environment is very difficult to shoot in, especially for action shots. It's difficult enough to try to freeze the peak of action without having to also worry about whether or not you have enough light to focus. But, again, the lens seems to be fast enough to handle this tough situation.

Hope you have a great time with it and lots of wonderful images. Enjoy.

Jim