AppsFlyer is being used by the whole organization. We have a central AppsFlyer integration that supports all the apps. 59 apps so far! We use AppsFlyer to achieve measurement for marketing campaigns for these mobile apps.
AppsFlyer dashboard reflects metrics in real time. If you click on a link on your mobile device and then install/engage, then, the result shows up in the AppsFlyer dashboard within the minute. This fast metric is really useful for testing.
AppsFlyer has a product called data vault that gives you both organic and non-organic traffic attribution details - for every single call made. It is great for doing more analysis.
AppsFlyer customer service is phenomenal - I have phone access to at least two people in Appsflyer - one an account manager, and another, an engineer.
AppsFlyer has great integration with other mobile networks (SSPs). I was evaluating using DoubleClick for Mobile vs AppsFlyer. At the time of evaluation, AppsFlyer was miles ahead and integrated with every ad network that we were interested in. Moreover, Facebook has the most audience that we are interested in - AppsFlyer was better suited for that than DoubleClick.
We actually did an integration with Kochava. Our integration was Server To Server. It did not work out - we never got the right attribution. It was also a challenge to verify a real end-to-end campaign with a mobile network. To be fair, this was done 3-4 years ago, and Kochava might have improved in the meantime.
I evaluated DoubleClick as a way for measuring mobile attribution but gave up when I realized that most of our audience is on Facebook. DoubleClick does not integrate with Facebook, but AppsFlyer does.
If you are doing marketing for apps and doing real-time bidding/price adjustments, then, AppsFlyer's integration will help you double the value (than if you did no integration - basically ran a cost-per-click campaign). If you wanted to do funnel analysis of how your users navigate your product, then use something else - like Flurry Analytics.
10 - We have a central system - so the number of people depending on AppsFlyer is close to 100. But only 10 people deal with AppsFlyer directly - they are the operations manager, media buying team, and integration engineers.