Users will trade price and flexibility in exchange for simplicity and elegance.

Google Buzz is like FriendFeed, the social aggregator acquired by Facebook last year and now partially integrated in the Facebook news feed. Actually Google Buzz is exactly like FriendFeed at the difference it is integrated in the most used Webapp of all time: Webmail.
Like Friendfeed you can integrate your other social activities (Twitter, Picasa, Flikr Youtube, Reader, and any other RSS output like your blog). Your Followers can comment on each of your buzz and you received the notification by email. As Buzz is fully integrated to Gmail, you can comment back directly from your inbox. Again like FriendFeed, you can comment and like any buzz, including the ones that are from external sources.
Being fully integrated to Gmail is a double-edged sword, on one side you get an instant fellowship, but on the other side the people who does not have a Gmail account need to follow you on your ugly profile page.
Friendfeed was used only by a bunch of geeks and never had the attention it deserves by the general population to grow beyond its borders. Everyone I knew around me (as early adopter) had a Friendfeed account, but was never using it to track their friends online contributions. And then Friendfeed got acquired by Facebook, making it easier for everyone to integrate their social activities in their Facebook news feed.
The problem I have with Google Buzz is the same I had with FriendFeed. As you are able to aggregate your social activities from other sources, it just becomes another access point to get in touch with my friends. I’m able to follow my friends favourite posts in Google Reader, but they are also integrated in Facebook through FriendFeed and probably push to Twitter by the same service and integrated here in Google Buzz where I follow that same person status that also includes his Twitter account entries. But I follow also that same person Tweets in my Tumblr dashboard. In no time I get bombarded and oversaturated with the same information on different platforms.
What I predict is that, over time, when the buzz will vanish, people will hide the Google Buzz label to follow their friends activity on a single social platform: Facebook, where at least you can filter and curate the duplicate posts from the different sources.
Google will adapt the product to its users base with time like they did with Google Reader and I’m sure a second look could be given at this point.