I like the Buffer stream, it’s an interesting way of scheduling your post content, allowing you to control schedules and post immediately - think iTunes playlist controls.
I would love a scheduling feature that would allow me to generate random posting times, rather than a fixed schedule - I tend to think clockwork posting looks machine-like, even if there is care and thought put into the content creation process
Evaluate alongside other options - the interface and the stream may seem alien at first and may not suit all users.
Client social account management and content curation is much easier. Mobile app and browser extensions make like easy.