I think Google+ is better. Google will build Google+ social networking features and tools into almost all of its existing online services from Search to Documents to Video (YouTube). all Google+ events (updates, messages, etc.) as well as share content with friends without ever leaving the Google service you happen to be using. Millions and millions of people use Google's free services (Gmail, Docs, Search, etc.). Google+'s Sparks feature is another important differentiators from Facebook. Spark is Google leveraging its search engine to do something Facebook can’t do—give users an instant wellspring of relevant information to share with friends. Because Facebook has no search engine, its users must leave the site to find shareable data or wait for their friends the share it with them.
Yeah Google + is good social networking site. Facebook is the best social networking site as well as Google+ is also doing well.