Outreach is being used as a tool for mass communication to our prospected leads. I think the tool is great in streamlining tasks and allows us to net a wider audience from it, otherwise, our efforts would take in large part a colossal amount of manual effort. There is also a reporting component to the software that easily allows us to track our daily/weekly/monthly productivity.
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Outreach is well suited for organizations that have a large number of outbound efforts that require a consistent set of records. You can drop 1000 prospects into a sequence, throttle it to send 100 per day, set it to resume OOO replies after a few days, and set it and forget it. Just set up a schedule, make sure you exclude national holidays, and you don't have to touch it ever again.