To me pdf.net is the simplest PDF editing software I have ever used. It is even easier to use than Adobe Acrobat Professional. It is so easy to add a text block and then make slight positional adjustments of the text. For that I give them 5 Tacos and will keep my Tier 1 Subscription. That being said I do believe there is room for improvement. I really like the layout but wish there was a save button. The first time I tried using the signature tool the app crashed and I lost my work and had to start over. Also they have document sharing capability but I didn't see the ability to send a document to others for digital signature. I think this is a basic functionality for PDF editing software that would make this a more complete solution. Also if I was able to scan to email documents into the software it would enhance the capability of their document storage solution which has a lot of potential.