The most useful insights come from the user reviews shared to those sites.
You just have to remember that they're just like any other online review: you mostly hear from the very happy or very unhappy customers OR the ones that got asked by the company to leave a review (perhaps in return for an incentive).
You just have to remember that they're just like any other online review: you mostly hear from the very happy or very unhappy customers OR the ones that got asked by the company to leave a review (perhaps in return for an incentive).