The UI is outstanding and very effortless. Very impressed. My only issue was with advanced features. Would have liked to know ahead of time that they were additional fee. Everything looks included and don't like being told something cost money after the fact. Second, when telling me I had to upgrade to get additional feature, it should show the difference between what I am paying verses the new amount. I was on personal plan ($6) but to get the features I needed it was ($10). It said it was $10 for advanced plan but I didn't know if that meant $10 MORE than I was already paying. I had to open site in incognito mode, look at plans to figure it out... not fun. Lastly, I was trying to send 2 separate PDFs as one doc. It took me a while to figure out where Merge was. I didn't understand why all the options under Actions were greyed out. That was very frustrating and should be improved.

PDFfiller is so user friendly. It helps immensely as a private practice owner where I need to fill-in pdf documents, convert to other formats, and insert verified signatures. I would recommend to other business owners.

I like the system is very powerful and I can do a lot more things with formulas and programming features. I need to study deep your app and you have excellent support. I want to recognize for your work a Gilbie and I want to receive a manual or guide. I'm very happy and my imagination flies with your app to do a lot of applications.