What do you like best? Basically, it just works. There is no learning curve, no difficulties, no glitches. It is simple, does what it is supposed to do and more. I can merge sheets, sign docs, fill out forms ... everything that could otherwise be a hassle while working remotely. What do you dislike? It may just be my set up, but when I have completed the document on pdf Filler and click "save as," it downloads to my desktop as opposed to allowing me to set the folder of my choice on my hard drive. Not that big of a deal to open the download and 'save as' from there, but just a small annoyance. What problems are you solving with the product? What benefits have you realized? I often receive documents piecemeal - one page at a time - or I get them back from different signors in different configurations. I love that I can upload them all at once, merge them right off the bat and have the combined document. I can easily rearrange the pages if needed too. Also, during this Pandemic, it has proved invaluable in getting documents easily executed when you cannot meet with signors in person.