Summary: I used this continuously for the first 2 years, but with the increased use of multi-purpose cell phones I have been using the phone for all the functions that this provided. At this point it is quite out dated.
Summary: The recorder has all the functions I needed and fits easily into my pocket. It's playback sound is great. I borrowed a similar Sony from a friend before I looked for my own recorder, that is what got me onto this model and style.
Summary: If you are about to get the Sony ICD-p620 first consider that it doesn't work with 64 bits computer nor with mac. My p620 work perfectly since 2009 when I bought it. Recently I got a new computer ( a 64bits windows 7) and cant no longer download and edit my recordings. Sony support won't offer any solution, the net is also full of the same problem with no successful solution. Without being able to use the Digital Voice Editor the ICP-P620 is obsolete. Be careful.
Summary: Sony does not provide drivers to interface this device to Windows 7 and Vista 64 bit versions. Once I got rid of my old XP based computer I have no way to access my recordings with my new computer. This is a puzzling limitation since all my other USB devices (camera, memory sticks, backup disk drives) work fine with my Windows 7. Very disappointed with Sony's lack of support - reminiscent of what happens when you buy a cheap no-brand-name accessory.
Summary: I've owned the Sony ICD-P620 for more than two years. I use it about once a month. Overall, I give the Sony voice recorder ICD-P620 two stars instead of one because I suspect the design engineer conceived of it for primary use in personal 1:1 scenarios. So some of my criticisms may be of no interest to you if all you need is a voice recorder to record a conversation between individuals who are in close proximity to each other, like around a table.
Summary: Using the unit standalone is fine once you spend half an hour getting used to it. The amount of handling noise the mic picks up does seem excessive but otherwise sound quality is fine. But the software support is beyond dreadful. Sony really ought to have just made this a generic mass-storage device but no, apparently that wouldn't be annoying enough. No problem, install the drivers you say. Nope.
Summary: I have a unit that I have used for almost a year and I find that I need to replace the batteries (high quality alkaline) after about every 6 hours of use, which I believe is too frequently, especially since it will 60 hours of recording on HQ setting. It definitely should have a jack for an AC adapter. Recording quality is OK, editing features are marginal, and user interface (both the unit and editing software) is not intuitive.