I am using this product for my client work, and it has been great so far! It can do a lot of things, but I have found that most of the time they are just very expensive (i think $50-500 per month), which isn't always worth it.
However, there are some really cool things you can do with it like measure traffic and see how your social media posts get shared. If you're looking to track traffic or get insights into the success of your marketing campaigns, then infonline is great! We are able to use their service to measure traffic before we publish our posts, which helps us make sure we aren't wasting valuable time posting content that won't reach many people.