My Take
I use BrainPOP daily in instruction. My students have gotten used to to the characters in the videos and have grown to love the humor. The videos help teach students complicated ideas in a very simple manner. The videos tend to go more in depth than my curriculum, but it never hurts for students to learn more.
How I Use It
I use it when introducing a new topic- mainly in science. There are videos in many subject areas, however. Students can watch the videos on their iPads through the App, or we watch them together as a class. There are also quizzes that students can take after the videos, but we don't use those as much. Great tool!