The interface is very easy to use, it has all you need for your business needs as well! I have no complaints about this product at least not yet anyway :) It's been helpful so far but we are still learning how everything works with our specific requirements (we're working from outside).
If anyone looking into an App Store Intelligence tool then give them some time because there will be questions coming up along way until they understand their own unique data set/requirements fully - which can take weeks or months depending upon what type(s) of information one requires within each area such as sales / revenue etc.. There may also come times when more than 1 person wants access too certain areas however if someone else does want those same sections available via API integration please ensure both parties agree before implementing any changes otherwise things could get messy fast ;).