Owned for > 3 years
I have another Olympus recorder, LS-20M that records video and sound (in stereo) with higher definition. It features proprietary batteries, but has a memory slot and works with SD and Micro SD cards.... It's also larger and heavier, quite a chunk in my pocket.
Small, light, uses 2 replaceable AAA batteries, even rechargeables like NiMH or lithium; Batteries last quite a while; Microphone is fair to adequate; It has a jack for an external mic and one for earphones
Mono-recording (one audio channel); Does not have a way to add memory or use a card like an SD or Micro SD card; No Bluetooth or other networking; The display is a bit small and cramped, areas are re-used for different tasks or settings which can be confusing: this has a number of useful settings...