I've tried every product I've bought or been assigned. (Well, if it's an assignment and you write a review on it, it's part of the deal that you have to use
the product in order to write a proper review.)
Some that I don't care for, I may not use more than the 5 or 6 times it takes to get to know it enough to write a review, but I always try the product. I read reviews and product descriptions carefully
so I won't end up with too many toys and books that I don't enjoy.
I did several weeks of research on my first purchase of a pocket rocket recently and that research paid off. I think it's the best pocket rocket ever. Taking one's time and looking over what others say about the product does pay off, at least in my opinion.