Reviews - particularly on Amazon - are meaningless. The cat-and-mouse game has gone so far that as a consumer I see a 4.9 rating as indistinguishable from a 0.9 rating. Buying from an unknown brand is a crapshoot. Buying from a known brand on Amazon isn't much better.
And it makes me wonder how long these black hat practices are going to be useful to sellers. Most Amazon users have to be feeling the same way at this point.