Pros
ICON gives exciting opportunities to work with cutting edge technology, kind people, and exciting partners. Every day at ICON looks different and things are constantly new and different. It allows an eager employee to build a variety of skills and tools that they can use for their entire career.
Cons
Things at ICON are constantly changing. The ICON you may have worked at last year might not be the ICON you work at today. This can be really hard if you're not adaptable. It's also demanding and very "surge-y". It can be hard to predict when the big surges happen, but it's important to have a personal life that allows for periods of extreme commitment to your career (I am talking week-long+ sprints of working and sleeping only). This can be really difficult, if you aren't prepared for it.
Another key challenge is that ICON is a true start up. Nothing is guaranteed. If you're looking for a stable and reliable workplace for longterm consistent comfort, look elsewhere. But fortune also tends to favor the bold.