It helps you find people who dislike the same things as you. Seriously? Is it just for fun or what? No. Research does show that bonding over things you hate is much more powerful than bonding over things you like. [1]
So far the customer ratings have been quite promising, with hundreds of users rating it over 3 out of 5 stars. A lot of users left positive comments for its creativity. One reminder though, is that you have to login facebook to use it. The company notes that in the coming new version a non-facebook login will be added.