There's nothing faulty with the cardboard here but I am little disappointed with the things other sellers provide which this Cardboard doesn't have. So here are the pros and cons when compared to other similar products(of same price range)
Pros 1.Has adjustments to make it easier to use for people with glasses(spectacles).
Cons 1. No image on the product page. It was gamble buying this. 2. Has no strap. So you'll have to hold it with your hand all the time (unless you make a strap by yours...