there are tons of users here that use pheromones with success daily - so yes they do work. Please provide us with more information what you heard about pheromones and which expectations you have. Tell us where you would like to use them and which effects you would like to see so we can give you accurate advice which ones would fit your personality and your needs.
please read the stickies in the Womens section, especially this thread:
in other places there are some ridiculous marketing claims - but here you can get realistic information what pheromones can do for you: