USA — the community feedback threads here (like this one) gave me confidence to trial in the first place. Real user experiences are more valuable than advertising.
Community feedback is the most reliable signal for a service category like this. Marketing tells you nothing. Actual user experiences over time tell you everything.
UK — conclusion: systematic testing during a trial removes guesswork. The process I used took about a week but I have had zero regrets about the subscription since.
New Zealand — adding one final tip: note down your exact test setup before the trial and compare objectively. Avoid letting initial impressions bias the evaluation.