Has anyone recieved feedback from students regarding the use of NV?

Students have very high expectations of visual material. The things one can see on a smart phone for example has elevated our expectation of video quality, sound and graphic design. Powerpoint lacks any "wow' factor.

A pretest is given prior to a 6 week course. The students are asked questions pertaining to all subjects to be covered in the course. The expectation is that they will not know the answers or even what the questions are asking. After the pretest I feel I have the attention of the class when i speak.