How do you rate Google circles?

With all the developments of social networks over the years & the comming & going of sites like BEBO & My Space, can Google circles really last the pace? When Facebook came along, it could be argued that what made it so popular was not only right place - right time (right stage of development) but an ease of use for the end user. With over 600 million users now on Facebook it certainly is a success in the social network field. After facebook came twitter - Jack Deasy's 140 character site, that has become popular both with celebrity & the regular Joe soap. In fact, celebrity status is key on Twitter - Justin Bieber gets 32,000 re-tweets per tweet!! Yes, thats 32 thousand PER tweet. Then came along Google Circles - You certainly have the feeling of more security in that you can open up your circles - you can have a friends circle, family circle etc. etc. but I for one have found that slowly but surely they have introduced un-invited posts, new add banners and everything else you wanted to get away from on Facebook. Now, I know they have to get revenue but I for one liked it the way it was! Lorra