If you decide you don't like it, then you'll be able to downgrade your account, which will delete your
profile and remove any posts, circles and other Google+ content while still enabling access to Gmail and other Google services.
I must admit I am getting a bit tired of facebook. The spam is horrible and the apps are getting kinda silly. Google+ looks like it can be a lot of fun and more mature. Here's the link about Google+ Remember its in trial mode and only a select few people have been chosen to try it out. So be patient! Here's the link about Google+