In my experience it was quite good for a while, then they made a couple of changes and suddenly the feed was rendered absolutely useless. After more than two weeks of the feed showing me the exact same questions and answers every day with only 1-2 new ones inbetween I stopped using it.
And at that point they had changed parts of the site so much I couldn't figure out how to subscribe to new topics because all of them were replaced by user-created topics/groups like on Facebook(at least that's how I understood it).
And at that point they had changed parts of the site so much I couldn't figure out how to subscribe to new topics because all of them were replaced by user-created topics/groups like on Facebook(at least that's how I understood it).