The most helpful thing I find about Nxtwave is that the lecture videos are recorded and given to the students. Let's assume I stumbled upon a topic out of the blue and need help learning it, I can quickly pull out my lecture videos and see them n number of times. It is very easy to use and flexible. Review collected by and hosted on G2.com.
I would say the biggest downside might be that the videos are already recording. Again it is a very personal opinion. I would wish someone to teach the class and a recording of that particular class can be handed down to students. I mean if students are watching pre recorded videos what if someone just skips them because they have no interest? the ease of integration is its own enemy. Review collected by and hosted on G2.com.