I am secretary for several organizations and needed a backup to my shorthand notes. The Olympus seems to fill the bill quite nicely. I could adjust the circumstances (seminars) to fit the room size and number of people participating in the meeting.
The WS852 has so many options and is adjusted to several recording situations (seminars; dictation; etc.
Manual provided has a very small font. The screen is a trifle small; but manageable