I like that it is easy enough anyone can understand how this works (even if they don't have much experience).
It's also very intuitive once you've got your head around all its features/options but there are some things which could be improved such as being able to upload images from other sources than Dropbox or Google Drive etc - not sure why these would need adding when uploading via URL seems straight forward? And perhaps more importantly having an option where we dont' get any warnings about using too many resources at one time so everything runs smoothly rather then getting errors later down stream due issues loading documents into dropbox first before launching our program?!