It's quite amazing how many people buy purely on reviews so in that case your quite right in that it can make or break a product which is quite sad really as there is a wealth of products out there that don't get massive exposure or reviews that really should get a listen to.
If I was a manufacture and I was sending my product in for a review I would want a honest opinion, why? because I would like to know in which area my product could be improved, nothing is perfect in all areas so it is good to get others opinions on which aspects of the product could be improved, sometimes it's not only the sound but the small details that are important.
If I sent a product in for a review and it came back within a week, I would send it back again and ask for it to be reviewed properly, you can't judge a product in less that 1 month minimum, I know they don't have the time for 1 month, but you need to live with a product to see if you can live with it long term, what aspects of the product bothers you, sometimes you hear a product and think, yep that's quite good, but later certain aspects of the product bother you, you can't find these things out with a brief listen.
What about reliability, company back up? is it good? all things should be considered when a review is done.