Summary: It's a pretty cool gadget. I have only one problem with it. Sony doesn't support Linux, and pretty much makes it impossible for Linux to support it. It is a good recorder but I'm very disappointed that it isn't compatible with my computer.
Summary: I bought a Sony ICD-MX20 Digital Voice Recorder a week ago. I was surprised that Sony does not provide downloads of the associated software named "Digital Voice Editor". Sony Customer Service staff told me that if you lost the CD that came with the box, you had to buy a new one. Only patches of the software are available to download. The Customer Service personnel told me that it was corporate policy despite the fact that the software is bound to the digital device.
Summary: I purchased this for my graduate classes. It goes through batteries so quickly! (~6-7 hours of recording it needs new ones... so with 2-3 classes a day, I was going through large packs of batteries in no time) In addition to that complaint, the software is awful, and you have to convert the files to WAV format, THEN MP3... time consuming!
Summary: I love this recorder. My main purpose is to record my own voice. Would love it more if the batteries lasted longer. But, no complaints as a recorder. For MP3 listening I use Creative Zen that goes 16 hours on one AAA.
Summary: Excellent product. Smaller than I thought from the pictures and basically all plastic housing, buttons are small but that's fine with me. Other than that, it has everything a person could want, an FM radio that you can tape from, digital recordings that can be transferred to computer and then transferred to CD. Excellent for taping short wave radio transmissions such as convention programs, etc.