Have used it professionally for years with great results
From Austin, Texas, Amazon
20 November 2014
Summary: Great battery life with two AA's and works day in day out. I've used it mounted on the dashboard as a Location Sound Mixer on many HGTV House Hunters episodes where the couple will be driving in their car through a neighborhood talking about the houses. (Video with GoPros.
Summary: Unit got lost in the mail. Amazon gave a full refund. Bought a used unit on EBay for 1/2 price. Very happy because this is the best recorder I've used in 50 years of portable recording. One piece of advice: if you're holding it, don't move it in your hand as the internal mic picks up EVERYTHING.
Excellent recorder for usual recording conditions, albeit expensive and lacking voice activated recording with pauzes
25 May 2014
Summary: Of all the currently available pocket-size portable voice recorders, the LS-11 is one of the most expensive and for the usual recording conditions one of the best. I have used this device to record air traffic control, meetings, and normal conversations.
Summary: I owned many portable recorders like Tascam DR2D,DR100MKII,SONY D50,M10,you name it. LS-11 is definitely among the best! LS-11s are not like D50 or DR100MKII(these are too bulky sometimes). However when it comes to the sound quality, LS-11 sometimes even better than them(Just my opinion).
Great as a reference recorder, as well as an everyday recorded you can take with you!
Amazon Customer, Amazon
11 August 2013
Summary: I have been using this recorded for over 2 years now This Linear PCM recorder does a superb job of recording of the full frequency spectrum from 20 Hz to 44 kHz when used in the 96 kHz Linear PCM Recording Mode -according to Olympus specs.
Summary: I use this recorder with a speaker phone to record conversation with clients so I may send them a cd of the session. Transferring to discs is a snap. Quality is fantastic, this is my second recorder after my first met with an accident. It is small in size but huge in ability.