My wife and her friends (who amazingly all accepted her G+ invites and immediately started the service) like it much more than Facebook. My wife's an RN, and reasonably technically savvy, but not someone I'd call a "geek". I asked her why she liked it more and she said two things that I thought were interesting:

1) "Well, I like Google better anyway. So I'd rather use their service."

2) "It just feels better than facebook to me."

Really surprised me, considering that we're going to replace her Android phone that she's only been using for 6 months or so because she hates it so much and because she really likes to use facebook.

I'm not sure if her experience is going to be the norm, but it seems to bode well for Google.