I have used the free trial twice. When I signed up for a $6 one month personal subscription I was billed $20USD. I have sent an email about this and hope to have it resolved.

I feel that it was inappropriate and a bit shady to let a customer edit the PDF and then hit them with the credit card ask. Maybe let them do a test for 15m or something.

Some functions are not readily apparent but overall it is a great tool. I had difficulty when it auto-filled a date field that I wanted to leave blank. I struggled to clear it because the dropdown appeared every time I tried, and if I deleted the current date got restored by the dropdown. Then after I finally blanked the field it jumped to another and did the same thing. Once I got that cleared it would not let me go to the next page, insisting I populate another field intentionally left blank. I used the slider to jump forward and then approach the page I wanted from the other direction.