Despite of what all the guide books try to say about this show - how genuine, traditional and non-touristy it is - it still is a show for tourists... I mean - a *banjo* playing in a traditional Rapa Nui band? Somehow I doubt it.
But it is fun to look at - after all, the stage is full of nice, scantily dressed girls (and boys - preferences depend on your gender and tastes)... and it even gets interactive when the dancers pick volunteers from the audience and invite them to dance on the stage between the performances.
While it may feel a bit too much of the same towards the end, perhaps you should not miss this show during your Easter Island visit - I never-ever go to "traditional dance shows" during my trips, this was the only exception I can think of - and it was an interesting experience, no regrets.