I like that it's easy to integrate with other apps, as well has being able make your own custom applications using this SDK! It gives you great flexibility in how data can be used through an app or website/webpage (the 'Estimo' part).
The only thing i dislike about esti'mte would have been if they had made some of their APIs more open source so we could develop our ideas further ourselves instead having them come up new ones every time there was something released by Apple etc.. Also maybe consider adding support into android studio also? As my use case involves both iOS & Android - but since most people are focusing mainly upon one OS then perhaps don't add too much extra functionality which may not get utilised due its lacklustre popularity amongst users who aren’t really interested enough within just 1 single operating system either way works out fine :).