There are many ways to find out, unfortunately, only a few are legit.
If you stick around then you will find what you are looking for by finding out whom to talk to. However, you cannot source post or ask for such sources on the board.
now, you can go and ask some people whom have taken a certain product from certain companies and allow them to tell you what their experience was. Alas, that only goes as far as your trust for that person which you are asking.