I returned my Surface Pro 3 because for some reason, I feel like the Surface series isn't very reliable yet (it has many problems including heating, loud fans, etc.) The only reason why I bought the surface pro was because of the pen. I was originally going to take my surface to lectures to scribble down some notes on PDF documents so I don't have to print out ~10 pages/day. For some reason, I feel like ipads can do this job as well. So I would like to hear from some people who have used those fine-point styli (adonit, wacom, etc.). The normal styli that have the huge circular thing at the tip are just terrible. I know I can never get used to them. But with fine-point tip, I might actually use an ipad to replace the surface pro 3. Most importantly, are those fine-point styli compatible with any apps that allow you to annotate on pdfs? PDFs are the only format I use so the pen is going to be useless if it only allows me to write notes on a blank notepad or something like that. I would really appreciate it if anyone could give me some inputs.