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All good points, but my Google+ experience has shown up two annoying flaws.
1. It's impossible to know what's going on. If I go to my feeds or whatever they are called, old messages sit at the top of the page. Newer ones are scattered throughout - that's just confusing.
2. About 50% of the people following me, or adding or whatever the term Google+ uses is, are flaky. The only option Google's email message gives me is to follow them - what's more it bundled the non-flaky incoming requests with the flaky ones.
I hope Google+ is a work in progress and some of these rough edges get knocked off before too much longer.
3 years ago on Why Twitter Should be Very Worried About Google+