Although the "multiple photos" function in the app is great, it would be nice if the app allows you to upload a PDF document, rather than a jpg. We have to upload documents that are multiple pages. As it stands, each page of the document has to be saved to the camera roll individually, then attached individually.
Also, because they have to be "scanned" in like a photocopy, rather than a picture of a document, we had a bring in a 3rd party app (Tinyscanner) to accomplish this. Even then the photo is blurry by the time it reaches the end product if the GoCanvas PDF.