GS300 owner
I purchased this camera three months ago. From my research on the web, it was considered an excellent camera particularly the video quality at its price point. I wanted a 3CCD camera but I didn't want to pay a lot of money.
The video quality is great! In fact, I like everything about this camera except...
It has no headphone jack nor any way to adjust the audio input. Also, audio playback is through the internal speaker with no volume control.
EDIT: In playback mode, the zoom button adjusts playback volume. (Sorry for the mistake)
The build-in stereo microphone does a good job, but an external microphone almost always will improve the audio (on any camcorder).
If you intend to add an external microphone, you will have to connect an inline volume control or an external mixer in order to adjust the audio. Plus, with no headphone jack, you will be adjusting the audio "blind".
This is probably not a big deal for the camera's intended market, but it is a limitation for me.
NOTE: The 16x9 mode is not a "true" widescreen mode.
Otherwise, still images are sharp. The jog-wheel control and LCD menus are easy to use. The camera is light and feels comfortable in my hand.
For the price, I don't think it can be beat.
Chuck
BTW: This is my first post on MacRumors! (I'm a long-time lurker.)