I got eSoftTools NSF to PST Converter tool from google and love it. The working and operation of the software are awesome and it takes around 10-seconds to open my NSF file and show me all items in a good format. Firstly I tried its demo version and migrate limited records (25 items) and looks the converted file is correct. After that, I buy a license and migrate my entire mailbox to PST file. I personally feel, this tool working perfectly and convert NSF to PST without missing any NSF documents.