I've been using the tool for quite a while. I like the quality of the application, and three Infogram features I really admire.
1. It's the fastest way for me to create responsible diagrams and graphs. There are dozens of interactive charts and maps to choose to present various kinds of data. There's no any similar services that I know of.
2. The templates have an attractive design. I create infographics, presentation slides and dashboards for mere couple of hours not being a web-designer. And all of them create a WOW effect at audience.
3. The interface is well thought-out and easy to use. Infogram has a vast library of elements, beautiful color schemes and careful balanced mockups, frames, and layouts. Alongside with drag-and-drop editor it makes the process of design enjoyable. Review collected by and hosted on G2.com.