I love the ease of scheduling posts for several platforms at once and the ability to customize each post for that platform! It's not just the same message being blasted everywhere.
Instagram is not fully integrated, Buffer sends you a reminder to post to Instagram at your scheduled time and makes it easy to do so, but does not post for you.
Great for all platforms except Instagram
Creating a big presence across social media is a problem Buffer has helped us solve. I am the only social media manager for my company and we are a very personal company and need that presence, but it's too much for me to do it all without Buffer.