Jim Carrey does wonders with a slight premise that finds his reserved; emotionally-distant character; Carl Allen; a banker who routinely turns down loan applications; accepting a challenge to open up to life by saying "yes" to everything. A man who constantly disappoints friends by weasling out of opportunities for bonding and happiness; Carl radically changes into a creature of complete spontaneity. By never saying no anymore; he gets into situations with unpredictable outcomes; such as driving a homeless stranger to a scary-looking park at night. But for the most part; whatever Carl says yes to becomes a road to worthwhile experiences; even receiving a promotion at work for approving hundreds of micro-loans against all policy. Zooey Deschanel; who often plays appealing kooks; is very good as Carl's girlfriend; a free spirit who takes to his positivity about everything--for awhile; anyway. Director Peyton Reed (Down with Love) makes the most out of the gimmicky comedy; as does Carrey; who does wonders with scenes that are often left open-ended just to see what the brilliant comic will do with them. --Tom Keogh