PDFfiller

I like it and I recommend it to anyone who works with Forms that cannot be edited using another softwares.

Vorteile

In my job we need to complete a LOT of forms (we are a law firm specialized in tax and corporate law so we need to complete a lot of forms that come in PDF format) and some of them doesn´t allow us to make any edit in the regular PDF program so PDFFiller is our salvation. It is super easy to use and it allows you to edit the entire document using only this software. You can add text or even delete parts that you don´t need. It is a software that doesn´t require any effort to understand because everything is as simple as upload the document, make the changes and save as pdf or print the document. I use it every day and I find it very complete for the things that I need.

Nachteile

You are not able to use it in several computers, so if by mistake you open your session on another computer you may loose your work.

Vorteile

pdffiller is a pdf processor quite different from the others, you can not only convert your files from pdf to other formats (and obviously from word, excel and others to pdf), but you can directly edit and process your texts online, so which you can write about the document, underline, place images, delete phrases and all the other things that a word processor allows you to do.
Another advantage and surprises that you have, is that you can use files that are not only on your hard drive, but you can also use files from the web (through the address of the document) and you can integrate pdffiller with some app that you use daily as google drive, box, one drive and others.
Finally, a very remarkable feature is that once you finish editing the file, you can choose some classic options such as the format in which you save it, but it also gives you the option to share it via mail, print it, send it by fax and use it in some social networks like facebook.

Nachteile

Even if it is a bit strange, I miss the function of compressing the files, because whenever you add images to some document, the weight of the file increases a lot and makes the handling of the file more difficult. Besides that, there is nothing more to comment.