What do you like best?
As a Realtor, my whole business is based on electronic documentation. PDF filler is kind of named poorly, because it really is a PDF editor. It allows you to easily change almost anything on a pdf document...across both desktop and mobile platforms. It simply works as you'd expect it to...every time. I use it practically every day.
What do you dislike?
I wish there were better tools for generating lines (how about a toggle into and out of orthagonal for a line?) It should allow deeper zooming with a thumbnail view showing where you are in the overall document. I like my pdfs to look perfect and sometimes these limit me in that goal.
What problems are you solving with the product? What benefits have you realized?
A Realtor literally lives or dies on his/her electronic documentation. This tool lets me master the changes that inevitably occur with documents. I use it every day.

What do you like best?
In our busy world, it is great to find a tool like PDFfiller to make things easier and to make sure private information is kept private. We no longer send attachments that can be read in an email that has sensitive information. Using templates has cut down our document sharing time! We now create a template that can be used over and over again. The big win in the form filling tool is the ability to add validation for the data entry.
What do you dislike?
The only complaint I get from users is PDFfiller documents are not showing up in their primary inbox. They have to search for them. We made it mandatory to check the box to send a copy of the email notification to our email address. This has made it easier to forward the email with the secure link to the recipient if they can't seem to find the PDFfiller email generated to them.
Recommendations to others considering the product:
Really take a look at your existing document and take the time to setup templates.
What problems are you solving with the product? What benefits have you realized?
In our office, we have tons of forms that need to have checkboxes and other types of validation done along with making sure it is easy for our users can easily sign the documents. PDFFiller provides the validation we need for our users to fill out forms properly. PDFfiller has multiple ways for users to sign electronically whether they are on their mobile device or their laptop; signing electronically is easy for them.

What do you like best?
It is 100% easier than anything else I have ever used to manipulate and work within pdf files. Please contact me if you would like a reference. I have told everyone about it and how great the site is for true productivity.
What do you dislike?
It is a very robust platform that could use a few more page editing tools - what about cut and paste to move a line of text left or right?
Recommendations to others considering the product:
Definitely get it. It is the best money spent for my productivity. Per the question above, I am now going to check out and see if this integrates with other software!!
What problems are you solving with the product? What benefits have you realized?
I work on government contracts which require pages and pages filled out. I import them all into pdffiller and work right from there.