Will you be staying or leaving? Personally I enjoy it more than Facebook or Twitter so I will be staying.
I'd be on Google+ more if the iOS app didnt crash on iOS 5 everytime i click anything other then notifications. But I do like it better then Facebook, but I like twitter the best.
+ 1 for me! I might use it more once the app works like it should on iOS 5.
However I see a couple of disadvantages for G+. One downfall is most people aren't going to switch from Facebook. A second downfall is that they will not want to update both G+ and Facebook. Facebook just has too much of a lead over G+ IMO. Most of my friends are already established on Facebook and aren't interested in starting over on G+.
And the Google+ app has just been updated to support iPad, iPod Touch, and iOS 5.
Will you be staying or leaving? Personally I enjoy it more than Facebook or Twitter so I will be staying.
Google+? For me, it's more and more "meh" every day.
I love it. All the advantages of Twitter and a forum rolled into one without the games and silliness associated with Facebook. I could easily use it instead of the other two even without a usable app. After all, when I first started on Twitter there were no apps.
G+ has so much more to offer.