It is very easy for me as it allows us send thousands or even tens (if you are running ads) campaigns in just seconds with no manual work at all! I think also they have not so good support system when managing your account from their side but this might be my mistake too :). They offer everything we need - great pricing model which does allow small budgets use case like ours; simple interface makes things really easier while working there ; few more features could make our life better if needed by users would ask them about those topics ;) Also using some other tools together helps compare results between different solution/companies easily without having time spend going back&forth searching info :) Great product overall though! We used Gengo first because one day i found out its price was much lower than others who wanted higher volume usage plans compared w.