I agree with you for example not all buyers of smartphone know what exactly the specs they are looking for either that capabilities of smartphone they just what something that can offer amazing performance and a lot of features but down to the specifics they are not knowledgeable enough to check whether is this series of phone suite or does their lifestyle, for instance the price not all people know if a phone is overprice or not or they just paying more just for the brand not for the specific parts so the reviews will be not that enough to be reliable if the one who is posting it is just an average user.
yes this is the problem of potential customers in famous online shops like ebay, amazon and for the south east asia lazada.. not all reviews are helpful some are really vague and some are not real so I think with the integration of lina in this industry will make a change and will improve the reliability of reviews.