I can give a 100% guarantee certificate that NSF to pst conversion can be done in a proper description by using the SysInspire NSF to PST converter.
This SysInspire tool exports the Lotus
Notes to pst just by a few noticeable steps. The thing I liked the most in this third party tool is the maintenance of security of the database including all the evidence about the contents are kept securely without any spreading out of the facts present in it.
This NSF to PST converter exports Lotus Notes to pst including all the mailbox contents like the emails, contacts, journals, calendars, etc.
I had large bulky pst files which were converted to smaller sizes between 1GB to 10GB due to the advanced pst splitter option available.
Just I downloaded the free edition of the SysInspire tool and was successful in converting the Lotus Notes to PST.
More info:- NSF to pst conversion