I was very impressed with this web-based PDF editor

Overall my experience has pretty very positive with PDFfiller.

Pros

My colleague recommended PDFfiler as I needed a quick way to sign documents while on the road. PDFfiller has all the features I need, even with the free version of the software.

Cons

I think to take this software to the next level, the developer should create browser plugins to sign documents without having to upload them to the PDFfiller website.