My 4-star rating is for "simple" products where the specs are not too complicated like a flashlight or a HDMI to USB capture device.
But when it comes to more complicated products such as laptop pc's or phones or tablets, the product specs are almost always lacking in completeness. I shy away from purchasing these products (even when the price is enticing) because I want to avoid disappointment upon receipt and the difficulty of shipping back to the Chinavasion supplier.