I love this vest! Visibility is the name of the game with urban biking; since I started wearing this vest I've noticed a distinct uptick in drivers seeing me, especially on cloudy days or at twilight. The pink is much more fun than day-glo orange or yellow and just as visible; the pockets give me someplace to put my phone when I'm biking in yoga clothes (which is often!). I took the other reviewers' advice and sized up - I'm usually a medium, and the large fits me perfectly.
I do wish it had more reflective properties; I'd assumed that the grey areas were all reflective, but the only reflective parts are a small stripe at the low back and the logo at the hem. Still, given that I've got enough blinky lights for a one-bike rave, I'm probably okay on that front.