Every review here is built the same way: read what owners wrote, sort it by what it describes, score it against a fixed grid. Same procedure every time, so two reviews on this site can be held against each other. Below is the whole thing, including the parts where it stops working.
Four places, and they disagree
A mattress that sells in volume leaves traces in four kinds of place. The disagreement between them is the useful part — when all four say the same thing, that is worth more than any one of them saying it loudly.
Reddit and owner forums
Where the two-year report lives. Someone posting at month twenty-six has no reason to flatter anyone and nothing left to justify. Weighted heaviest.
Retailer and marketplace reviews
Volume, but skewed early: most are written within a fortnight of delivery, when any mattress is still soft and still new. Counted, never on their own.
Video comment sections
The least curated of the four, and often the only place a specific defect gets named rather than described. Comments about an actual purchase count; reactions to the video do not.
The brand’s own pages
Read for what the company commits to in writing — trial length, warranty exclusions, who pays return shipping — not for the star rating it chooses to show.
What gets scored
Eight criteria, the same eight every time. A review says out loud where the sample was too thin to score one of them rather than guessing.
Firmness against the label
How far owners land from the number on the product page, and in which direction.
Support over time
Sagging, softening and body impressions — every report dated by how long the owner had been on it. An eight-month complaint and a three-year one are different facts.
Edge
Whether the perimeter holds when you sit on it to put your shoes on.
Motion transfer
Whether a partner moving is something couples raise without being asked.
Heat
Raised by many or by a few, year-round or only in July. The season attached to a complaint changes what it means.
Trial and returns
The written policy and the reported experience, scored separately. They part company more often than you would expect.
Warranty
The impression depth that triggers a claim, and the exclusions that void it. This is where the fine print earns or loses the brand its score.
Price actually paid
Nobody pays list. Value is scored against the street price owners report, not the MSRP on the site.
How to read the percentages
When a review says heat is raised in eighteen per cent of reports, that is eighteen per cent of the people who wrote something. It is not eighteen per cent of buyers, and it is not a defect rate.
People with a problem write more often than people without one. That is true of every product ever sold, and it is why the figure is only worth anything next to the same figure for a rival mattress, read the same way, from the same kinds of source.
Where there are too few reports to carry a percentage honestly, you get the individual cases instead, with links. A thin sample is itself a finding — a mattress nobody writes about after a year is telling you something.
What this cannot answer
Whether it will suit you. Firmness is a body-weight problem before it is a product problem: the same mattress reads medium at 140 lb and soft at 240 lb, and side sleepers and back sleepers are effectively reviewing different objects.
Aggregated reports are good at two things — showing where a mattress tends to fail, and showing how the company behaves when it does. They cannot tell you how it will feel under your own weight. Only the trial period can, which is why the return terms are scored as heavily here as the comfort.