Bests & Worsts Reviews from Amazon

Bought this because the rating is 4 out of 5, but it turns out to be a huge disappointment. 3 cameras do not work, tried to reset them many times, it was so frustrating that I have wasted hours on the configuration.   I go back to the reviews to see if anyone else has the same problem, and shockingly found that quite a number of customers received malfunctioning cameras out of the box! Even some 5 star reviews state that one or two cameras are defectives. This really makes me question the credibility of the rating and reviews for this product.   I am pointing this out because I don’t want to see more people getting fooled by the best seller badge and the 4-star rating.