I like how easy it is for me as an individual customer or business owner/manager of my own shop to locate nearby stores that carry items i'm looking for! The lack of user friendly features are sometimes frustrating but nothing too bad considering their price point (free).
As far as any dislikes go this isn't really one i can think about because they give you what you're asking for at first glance. This tool has helped our organization increase sales by providing us insight into which locations have similar product selections we sell - meaning when someone searches online for "soap" or something else we offer it will show up where they live so there's less guess work involved.