Loaded the file the morning we got it. ROAS improved roughly 30% versus the lookalike audience we ran before. Bought it to support a dermatologist doctor rollout in Australia. Genuinely useful.
Field-tested by my team. Encoded UTF-8 with no character-set surprises in Excel. Bought it to handle dermatologist doctor lead-gen for the Australia region. Wished a few smaller towns had been included.