Especially if it's a product category that gets daily use from the people who purchase whatever it is, it seems like there's usually some passionate people around who know what they're talking about. Only issue is that you can get deep into the weeds on personal preference stuff.
That’s another tricky thing to fix: products have the same page and information, but the product does change over time. And that’s hard to indicate in a review because the changes are so subtle.
Yes and: With Amazon's comingling, you could unknowlingly receive a knockoff vs original.
The real trick is finding an obscure forum on your topic. That keeps off the kids and the astroturf.