The Canon 20mm has an average review score of 68.5%

Score (%):
Canon EF 20mm f/2.8 USM (Tested)
Multiple user reviews on slrgear.com
Read the full review...

67

Canon EF 20mm f/2.8 USM - Review / Lab Test Report
The full in-depth review from photozone.de
Read the full review...

70