I'm not that familiar with My Shopper's Voice, but it looks like it's sponsored by Colgate-Palmolive, so it might be worth checking out! Here's some of what their signup page has to say:
Take fun survey topics on shopping and be part of exclusive group discussions where you can get sneak peeks at new product ideas and be able to discuss shopping tips and tricks with others like you. Win great prizes for your participation in the panel. Each month you have the chance of winning one of the following - a grand prize of $200 or one of two runner-up $100 prizes!
Have you taken surveys for My Shopper's Voice before?