The sound quality is sufficiently clear when recording, but is not sensitive enough to satisfy the most demanding users such as musicians or professional reporters. As the other reviewers have said, you need a relatively loud source as there is no sensitivity switch or zoom feature. It does have the 90-120 degree switch, so you can toggle the range depending on what you are recording.

This microphone is very compatible with many different devices. MD is the best though.

Here's one MD player recorder that I know has the microphone jack and works great with this microphone:
'Sony MZ-NF810CK Net MD MiniDisc Recorder with Car Kit'

However, don't be fooled. Not every MD player has the appropriate Mic Jack. Double Check the technical documentation to make sure. Units that definitely do not have it are:
'Sony MZ-NE410 High Speed Net MD Walkman Recorder'

Notice the deceptive "Recorder" moniker in the product name. Don't be fooled! Very few MD "recorders" actually record with a microphone!

Not sure about these:
'Sony MZ-NF610 High Speed Net MD Walkman Recorder'
'Sony MZ-N510CK NetMD Walkman/Recorder with Car Kit'
'Sony MZ-N505 Net MD Walkman Player/Recorder'

Do your research before purchasing any MD player. All in all, this is a good value and pretty good quality for a digital microphone.

Simple setup - excellent price point for recordings (Rating: 5.00)
Review : I use the MS-MS907 microphone on a weekly basis. My main use of this microphone is to record lectures and it does a good job of it. Of course microphone placement is the key to a good recording but the MS907 provides a good pickup at this price point. It operates on a single AA battery and is highly efficient with energy consumption. Another feature I like about this microphone is that it provides two pickup pattern (90degrees for an individual speaker and 120degrees to accomodate a chorus).

I would recommend investing in either a minidisc recorder or a MP3 recorder.

This mic is great for the price (Rating: 5.00)
Review : If you look around you'll see that this mic is one of the most popular for recording concerts, lectures, etc. I found it to be clear when recording, although there needed to be moderate volume. There is no sensitivity switch. It does have the 90-120 degree switch, so you can increase the scope of recording. The unit is built well, and comes apart easily to allow replacement of the battery, which should last a long time. When using this microphone, make sure if the volume level reaching you is not high enough, position it better, like one other reviewer said, or spend the extra money and get a zoom microphone. Also an mp3 player that allows digital recording comes in really handy.