
Soomla is a two-side product for mobile app publishers:
1-st side: tools to understand and improve your ad monetization - very usefull especially for developers that are new to ad monetization; most of this services has no direct alternatives and make developers first steps much easier, so it's really great.
2-nd side: tool for competitor analysis (UA and creatives intelligence); it's a different story, cause there are a lot of services with similar functions, yet Soomla provide some unique data that noone else has (like CTR for creatives). Review collected by and hosted on G2.com.
Cant say that all Soomla services will provide you the best UX.
Also, there would be almost no info related to Facebook Audience Network (cause of FAN's policies, so noone has it either). Review collected by and hosted on G2.com.