Major problems: 1) Botting/Troll Farms - existing review systems suffer from sophisticated and persistent false positive and negative reviews. You may have sol

Major problems: 1) Botting/Troll Farms - existing review systems suffer from sophisticated and persistent false positive and negative reviews. You may have solved one half of this issue, but it's not hard to buy your competitors product, damage it, and submit a negative review. 2) Corporate Cycling - even presuming somehow you only have honest reviews, if your product is subject to frequent refreshes it is too easy for a company to say "oh we fixed that in latest model". 3) Statistical significance - again presuming you don't have the first two problems, how do you know whether a failure mode is common or not? Everything breaks - its about whether or not it breaks 1 in 100 or 1 in 10, whether it lasts for 5 years or 20. I'm not sure subjective "oh this broke for me" tells you that it is common. I think you also need the instances where nothing broke to calculate true failure rate.