I've been using Sony's ECM-MS907 for more than 5 years now and have loved it; so two weeks ago I ordered the Sony ECM-CS10 to use for audio journal keeping while on the road. When it arrived just a few days ago, I compared the audio quality of its recordings to that of my existing Sony microphone. In spite of its pleasing aesthetics, I found it to be a sad disappointment!!! The ECM-CS10 is a very noisy microphone with an audio quality far inferior of what I would expect from a Sony mic. (I wonder whether this is because it is a plug-in-power mic).
Frankly, I think I'm probably going to return it and look for something else. I've purchased a number of microphones on eBay and have only been satisfied with one other type of compact mic. Microsound makes it; and its a mic with a cable lead about three inches long. I'm not in any way affiliated with them, but I would recommend their product.
With all of this said, I think I still might spring for Sony's top-of-the-line lapel microphone, just to see whether it's any good.