Primary source, or nothing
Every price, journey time and opening hour comes from the company or the institution that sets it. Never from another guide. If a competitor gives a figure we cannot reproduce, we write that they give it and that we have not verified it, rather than repeating it as if it were ours.
Every table says where it came from and when
Under each table there is a line naming the system the data came from and the date it was consulted. A price with no date is a price you cannot judge. It also means you can catch us: if a figure has gone stale, the line says so.
Counts get validated twice
When something has to be counted, like departures in a day, we sample it twice at different intervals and compare. If the two sweeps disagree we publish the union of both and say that they disagreed. A single sweep at a fixed interval quietly misses services and produces a confident number that is wrong.
When the sources disagree, that is the story
The most useful thing we produce is usually not the figure, it is the table showing what each source claims next to what we measured. Numbers get copied between guides for years without anyone checking them again, and the gap between the copied figure and the real one is often large enough to change your plans.
What we do not claim
We do not review restaurants we have not eaten in, tours we have not taken, or hotels we have not slept in. Where a page would benefit from first hand experience we do not have, it says so instead of inventing it. There is no best of anything here unless we can show the measurement that makes it best.
Corrections
When we correct a published figure, the page says what it used to say and why that was wrong. Silently editing a number and moving on is how a site stops being checkable.