The Sigma 180mm Macro has an average review score of 86.5%

Score (%):
Sigma 180mm f/3.5 EX DG IF HSM APO Macro
Multiple user reviews on slrgear.com
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90

Sigma AF 180mm f/3.5 EX HSM APO macro - Review / Test Report
The full in-depth review from photozone.de
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83