Why do some highly-rated comforters still get complaints about being 'too hot' or 'too flat'?

Across the reviewers we read, this is the single most common disagreement in the category: the same comforter described as 'cloud-like' by one buyer is called 'too warm and heavy' by another, because perceived warmth depends heavily on bedroom temperature, mattress, and personal metabolism. Read complaints in the context of the reviewer's climate, not as universal flaws.