Great recorder
I purchased this to work with Dragon Naturally Speaking and it has worked great with easy transfer of files then recognition almost as good as my headset. It is easy to use with intuitive menus. It is sturdy and has handled many trips to the floor and still looks and works like new.

Great Product
Still have to try to find the best setting though.
Volume is a bit low...have to find a way to increase that but quality is awesome.
One thing i didnt like was the voice up. It doesnt work that well. It just increases everything including the noise.

Solutions to inaccurate reviews.
This "review" is primarily to clear up some inaaccuracies I have read in many reviews for this recorder. First, you can turn off this recorder without removing the batteries. Second, Digital Voice Editor Software IS available!!!

Turning Off the Sony ICD-MX20:

Flip the hold switch on the back of the recorder -> wait -> the display will turn off. Further, even with the display "on" battery drain is minimal. Think of it as a digital watch. You don't have to turn off that display, right. The majority of battery drain on this device occurs during recording and playback.

Digital Voice Editor Software:

I had the same problem of losing the CD. I have owned this recorder for almost 2 years and have always been able to find the software for download. 2 years ago, however, it wasn't available from Sony. I had to do a deep search on google until I found a consumer who set up a download link.

Currently the software is available for download from Sony. I think this became publicly available after conflicts with Vista were discovered. If you do a google search for the latest version "Sony Digital Voice Editor Version 3.1.03" it should be one of the first results. If you find you need an older version of "Digital Voice Editor", try doing a google search for "Sony Digital Voice Editor download truckerphoto". This "truckerphoto" website has download links to older versions and some helpful installation troubleshooting tips.

Personal Opinions:

As for my opinion on this recorder. I wish it recorded directly to MP3 instead of the Sony proprietary format (which requires the Digital Voice Editor software to convert to MP3). I do like that it will record to a memory stick duo card. Since cards are cheap these days, this gives you virtually unlimited recording space. I can record an entire semester of lectures on my 1GB card (high quality settings enabled) without a thought of running out of space.

Sound quality is excellent for dictation. However, I purchased this unit for recording in a classroom environment. Sound quality is still very good if you sit close to the front of the class room. However, if you have a lecturer that has a soft voice and you sit toward the middle/back of the class room you will certainly be disappointed. The voice up feature increases the volume, but also increases the background noise. I rarely find the voice up feature to help. I am currently exploring my options for external, directional microphones.

Finally, the little "joystick" control is a bit cumbersome. You will get use to it, but I often get annoyed while toggling through the menus.

Overall, I am satisfied with this recorder. Don't be fooled by the "Date First Available on Amazon" on this page. Maybe that is the date that it was available from a particular seller, but this recorder has been available from Sony since 2005. While I still believe it is a very good recorder, I would encourage others to compare with newer models and other manufacturers.

Tip: Invest in some high quality rechargeable batteries. The Maha MH-C9000 Battery Charger is probably the best you can get. Along with the MAHA AAA 1000 mAH NiMH batteries (the higher the mAH rating the better, as of the time of this review 1000 mAH is about the highest you can get). Also, don't be lured into the new "Low-Discharge NiMH" batteries for this device. These "Low-discharge" batteries are great if you are only going to use your recorder once or twice a month because they don't drain/discharge as quickly while not in use. However, if you use your recorder daily or several days a week you'll appreciate the higher mAH you can get from the standard NiMH batteries. I have personally used both verities of batteries and I get longer play/record times from the standard MAHA 1000 mAH batteries over the "eneloop" & "Acculoop" 800 mAH "low-discharge" batteries.

Device great but don't buy if you only have Macintosh
The device is great, audio quality and features fine, but their proprietary audio format and lack of ANY Macintosh software that can read it is infuriating. Fortunately I use boot camp but it is a pain. Sony should give you the option to recording uncompressed WAV or AIF, and not just their lousy MSV format. I knew before the purchase that the software they provide was not Mac compatible, but didn't know that the audio could not be read by ANY Mac software. Sony, get your act together.

Junk - and Sony should be ASHAMED!
Can I give this a minus five stars? I received mine not long after they began making them, when they were running over $200. It took two months on backorder to receive, and then it broke within a month. I didn't drop it, expose it to water, nothing. So I called them to return it, and spent 3 HOURS being shifted from person to person, with no results. 3 people I spoke to were obviously from India (and I don't have an issue with that if they can solve the problem,)they didn't know what backorder meant and told me that since it was order three months before, they would only be able to give me a refurbished recorder. I refused and finally insisted on speaking to an America. They gave my call to some 'manager' who tried to sell me the same line of bull. I refused to accept anything less, so finally he agreed to replace it with a new one and gave me a work order#. About a month later I got the digital recorder with a refurbished sticker on it! I was pissed, but it worked, so I let it go. Not ten months after that the thing's broken again! Does some weird stuff and won't work. They tell me they'll fix it for $140, with a 30 day guarantee on their work! So for a mere $300 to $400 investment you can have a piece of %*! that works for somewhere between 1-10 months. Olympus gets great reviews, the only bummer is Sony directly interfaces with Dragon Naturally Speaking (awesome software, though it takes training time), and Olympus doesn't. I'm looking into a way to make those two play well together; I'll let you know if it works. It's my opinion that this branch of Sony makes it their policy to use excessive hold times and shift callers around to get them to hang up and leave them alone. I've now spent over five hours on the phone between the two calls, and I still don't have a working recorder. I don't really understand this, since their software department was Extremely helpful, when I needed assistance with Acid Studio. Do they not realize, anything with the Sony name affects their customer's opinions of them? Sony Acid - Great! this thing - not worth your headache.