Problem with reviewing tech like this, is there are so many variables with things like lighting, position of the camera and even how good the game is. So any problems some have had, are not always going to be the hardware's fault, plus if the hardware was really bad, all the reviewers would be having issues with it, no just a few of them.
Basically PSVR is not perfect but when setup correctly, it offers a pretty decent VR experience, especially for the price and most of the games seem decent so far, even if there is no true killer app right now, overall it seems mostly pretty positive though.