"Sheer brilliance" refers to something that is extremely clever, intelligent, or outstanding. It represents an exceptional display of brilliance or genius. Full definition
With awesome quality, sheer brilliance in design techniques, impressive features, and uniqueness, these best waterproof smartphones are going to be a mass appealing products. (technowize.com)
We were there for the introduction of the DB7 in 1994 («Holds its own against the opposition and, in many spheres, shows them the way home»), the DB5 of 1964 («A man's car which challenges, satisfies and always excites») and the DB2 in 1950 («In the first rank for handling and sheer brilliance of performance»). (autocar.co.uk)
Played his role of keeping Liverpool's midfield out of goal, with sheer brilliance. (weallfollowunited.com)