Every casino listed here is one I have played at myself. The process is the same each time: I open an account the way any player would, complete the verification the operator asks for, deposit in EUR, play a real session across slots and live tables, and then request a withdrawal. Most of what ends up in a review only shows up in that last step, so it is the part I never skip.
Along the way I read the bonus terms in full, note the wagering requirement and the maximum bet allowed while a bonus is active, check which payment methods actually appear for a European account rather than which ones are advertised, and put a real question to support to see how long an answer takes. The score is built from six separate sub-ratings, and it moves when the site does, so a casino that slows its payouts down loses points later.