Honestly, I would be happier to use this product if it were not from Google. They already know too much.
That's funny, because I've been thinking, "They already know so much already anyway." Probably how they were hoping/expecting people would act.
As someone on the internet, they can already crawl any publicly available data about me, including blog posts, tweets, forum posts, mailing list emails, and social network metadata like marital status, gender, etc.
Google+, in theory, doesn't really tell them they don't already know, or can't easily figure out already, so it's purely value add.