Upon its release,
Mr.Mr received mostly positive reviews from
music critics. Heather Phares from
AllMusic labelled the EP "a set of songs that offers something for every kind of Girls' Generation and expands their musical reach." Phares further praised the EP for helping the group to be an outstanding case of Korean popular music. Music critics from webzine
Weiv praised the concepts and musical styles of
Mr.Mr; critic Subtlety said that all of its musical styles are evenly distributed, and felt that it did a good job of showcasing the 'third path of idols' by not only embracing sexy or cute, but rather both.
Mr.Mr. came second on the Gaon Monthly Album Chart of February, selling 87,824 physical copies, only behind
B.A.P's
First Sensibility, which sold over 91,000 units. The following month, it topped the Gaon Monthly Album Chart with sales of 70,295 copies. It was placed at number 47 on the Gaon Monthly Album Chart of April with a further 1,125 units sold. Overall,
Mr.Mr. was the fifth highest-selling physical album and the best-selling album by a girl group of 2014 in South Korea with total sales figures of 163,209 copies.
Mr.Mr. debuted at number 110 on the US
Billboard 200 chart, selling 3,000 copies in its first week. By doing so, the EP became Girls' Generation's highest-charting release on the
Billboard 200 following subgroup
TTS's
Twinkle, which charted at number 126 in 2012.
Mr.Mr. also peaked at number three on the
World Albums, and number 23 on the
Independent Albums charts. ==Track listing==