How we pick products

Each category starts with the questions that can change what you should buy. Capacity, room size, floor type, cleaning effort, compatibility and physical fit are common ones.

Right now the catalog covers 1031 needs, each written for shoppers and specific to its category.

One model name often covers several sizes, regions or generations. We record the model number and the United States ASIN, then check specs for that exact product wherever the source makes the difference clear.

If information is missing, we leave it missing. A gap never turns into a point in a product’s favor.

Each product is linked to the needs its documented design, specs or tested behavior can meet. A direct match ranks above a partial one. A product with no documented match gets no credit for that need.

The ranking combines whichever needs you select. The page then explains the result in plain words instead of handing you a percentage to decode.

Side by side, facts can reveal things that would take ages to piece together from dozens of product pages. We work out category medians, ranges, gaps and how many models meet several needs at once.

Every published calculation keeps its product set, input facts, sources and assumptions. We only show a conclusion when enough models are measured the same way.

Numbers that look alike can come from different test methods. We keep SACC cooling capacity apart from ASHRAE capacity, ISO projector brightness apart from ANSI brightness, and surge output apart from continuous output.

The desk checker keeps frame height apart from finished desktop height. The soundbar checker counts source inputs apart from the TV connection and includes detachable speakers in the docked width. Neither tool treats a missing spec as a confirmed fit.

When a conversion is reasonable, the calculation note says so. When values cannot be compared cleanly, the page leaves the conclusion out.

A buying guide opens with the recommended product, why we picked it, its main drawback, an alternative and a direct Amazon link. The checked facts and calculation notes sit further down in sections you can expand.

That way you can decide quickly, and search and AI tools can trace each recommendation back to the facts behind it.

Maker documentation confirms which model is which and what specs it claims. Independent publications add measured performance and real-world limits where they exist. We sum up their findings in our own words.

The sources page lists each source’s title, publisher, type and review date. Verified maker and independent references are linked in the evidence notes, so you can check the original documents yourself.

Before we change a product’s research date, we check for replacement models, spec changes, sources that have moved and new independent findings. A design change does not count as fresh product research.

We do not perform hands-on product testing. Confirm the exact model, compatibility and safety information before you buy. Read more about our research and how affiliate links fund it.