It is definitely the most popular dating site in the US and United Kingdom - probably because it offers great features for free.
They usually respond well and most are down for one night stands or a casual relationship so it's perfect if you don't want anything serious.
If you do want something serious it requires more work - there's a lot of filtering to do on the site. To give a proper Plenty of Fish Review I tested both the free version and the paid version.
If you're looking to get laid then this is an easy place with a lot of girls who are looking to get laid.
For men and women alike you'll see tons of images like If you're missing any of these in your life then go sign up for Po F!
However, the search function can't be used if you don't fill out the questions.