Zignal Labs is excellent, and it is great for social media marketing as it helps the users with the competitive social media marketing side. Zignal Labs is a good solution for quality response and accuracy.

The variety of tools and widgets that can be included in reports

As a large, global company that generates significant amounts of coverage, it's critical for us to track traditional and social media mentions in real time. We've tried dozens of tool suites, but none have compared to Zignal. Within a few minutes of setting up an account I had access to Zignal's suite of media analysis tools, which allow me to manipulate data and view coverage trends in dozens of different ways. Most important to me, though, is Zignal's alerting system, which notifies me immediately when we're mentioned in nearly every type of media -- print, broadcast, Twitter, Reddit, LexisNexis, etc. This seems simple, but anyone who works in PR can tell you how few tool suites can actually provide comprehensive and immediate mention alerts. Critically, the system allows me to precisely filter out the noise so I only see meaningful alerts. I personally just have not seen anything that can compare.