This show isn't ALL that bad, but it has been done before. There are 4 friends...2 are the couple, and the other 2 are good friends who are opposite sexes and will likely end up together, and then there are all sorts of random hookups and talking about them with each other, vividly, after. Big surprise, right? Another show about mostly selfish people in their 20s, who have some seemingly charming traits masking their lack of direction (e.g., "I'm going to look for her on craigslist missed connections").
EDIT: The last few episodes have improved and the characters are acting like real, young adult, human beings. It is very watchable at this point, although it has still been done before.