My experience with G+ is a lot like Google Wave. It was fun for 20 minutes, then the novelty wore off and I found it cumbersome. For example Circles... my father has 3 e-mail addresses, and I need to add them ALL to the Family circle, thus duplicating him 3 times.

With facebook, individuals are one-to-one, but on G+ it is possible for them to be one-to-many.

As much as I hate to say, I'd rather use what I already have, and what all my friends have... facebook.