This show is also the best of the Real Housewives franchise. The cast isn't clearly divided into two specific teams, like say Atlanta or Season 4 of New York City. The women all have relationships with one another that aren't always based on their relationship with yet another woman, if that makes sense. There are no teams, there are genuine relationships. Even with the advance of new cast members, they seem to already be in the world of the existing cast, but they're just being brought into the show.
Overall, this show is unique because it's actually REAL, and doesn't at all come across as producer-devised or contrived. If you just want to understand reality TV, this is perfect. It is the best reality show on TV.