Sample
21 redditors with explicit opinion · 18 positive · 2 negative · 1 neutral
Score
0.868 — formula: 0.75 × % positive + 0.25 × pos/neg ratio
Confidence95% CI: 65–95% · the true approval rate falls in this range with 95% statistical confidence
Verdict
Holy Grail — ≥80% positive across ≥20 redditors. Top tier.
Sources
r/Sephora, r/SkincareAddiction, r/40PlusSkinCare, r/30PlusSkinCare, r/tretinoin + 4 more