Definitely Useful As I mentioned, it makes the mailing process much more efficient. PDFiller allows you to create and mail PDFs easily, saving you the hassle of getting an envelope, purchasing a stamp, maybe having to go to the post office, etc. For me that has been its greatest strength. The PDF customization interface isn't bad, but it's not immediately usable. It takes a little bit of time to learn how to use it effectively. Right off the bat: I would not recommend this software to someone who isn't tech savvy or doesn't want a bit of a learning curve, for example, employers I've had in their 50s, 60s, and 70s who don't really "get" technology. The interface is fine if you just want to sign a document, but is not particularly intuitive when it comes to doing simple things like outright deleting portions of text. Too many steps.

Great tool for conversions Converting PDFs to spread sheets can be time consuming. This software is very functional, and eliminates the hassle. I like being able to convert my PDFs into the proper documents for further use. Most PDFs in their original form are totally unusable. I use this function to convert the document into a spread sheet. Great time saver. Nothing so far. Seems to be easy to use and very convenient.