What do you like best?
PDFfiller offers excellent editing and formatting features for business and personal use. I like the file conversion features as well.
What do you dislike?
Uploading documents is extremely slow, and you cannot upload multiple files at the same time.
Recommendations to others considering the product:
Great alternative for those who don't have Adobe Pro or some of the other premium Adobe products.
What problems are you solving with the product? What benefits have you realized?
Editing and signing capabilities for PDF's. Creating secure files.

What do you like best?
No more printing and filling out forms by hand.
What do you dislike?
I used to be able to upload a signature from an iPhone photo, and it could be placed on a document in a way that it look like it was written there, and not a pasted photo. I liked this and cannot seem to do this anymore.
What problems are you solving with the product? What benefits have you realized?
It's amazing how many forms still need to be filled out by hand in this age of tech and no typewriters. Printing documents, hand writing, then rescanning to a recipient is messy, time consuming and wastes ink and paper. Besides, make a mistake, and you need to start over with a new form. And don't get me started with "white out." PDFiller streamlines all this and results in a very neat, professional looking document. I do lots of contracts, and don't always get red-line drafts to work with. I can use PDFiller do do red-lining (word-processing changes to early drafts) and send them right back to the counter-parts. Then with the final draft the PDFiller signature feature allows me to initial or sign, and send - again without printing/rescanning. Since for many transactions e-transmitted signatures, as opposed to "wet" signatures, has become standard and legally acceptable the process is now a breeze. And if I still have to go back for further revisions the prior versions are all saved in PDFiller.