Has anyone tried National Geographic Wildlife Filmmaker?

I just picked up on this fun and applicable tool from this post on Kristin Fontichiaro's blog on SLMAM.

National Geographic Filmmaker lets kids create their own wildlife video with a library of video and sound clips. They can add their own captions too. You can save and share your final product. Visual learners will love this! Second graders will love this! I am sure NatGeo will add more clips as they develop the product. I agree with Joyce Valenza that a voice recording feature would be nice. I can't wait to share this with students! It's a great complement to our second graders' animal research project.