While easy to set up and use, it lacked several important features. We were unable to pick and choose specific products to show or not show. For instance, we did not want to show summer related items in the Fall or Winter, however, the only solution they offered was to make those items unavailable in our store. Obviously, this is unacceptable.
Additionally, the dashboard crashed frequently and half of the analytics did not show up. On the note of analytics, their "click through" and ROI numbers never matched what Facebook's own pixel indicated. While we use Flightplan for almost a year, we just decided to look elsewhere for our retargeting business.