I'm broadly happy with my FS100 - it works quite smoothly with iMovie'08 on my MacBook Pro. A few notes:
— It doesn't seem to mount properly unless I connect its power adaptor as well as the USB cable. This is surprisingly annoying, and in practice I'll mostly end up popping the card out. Except that:
— The card door is underneath the camera, so you have to remove a tripod plate if you have one fitted. Grrr.
— Low light performance is bad. Gain speckle is highly chromatic, and worse than with my Flip Ultra under similar conditions. The FS100's sensor is very small, and it shows.
— In more reasonable light - ie. outdoors during the day - the picture is pretty good. It's roughly on a par with my old Sony miniDV camera, a PC8E - one of the better single-chip DV cameras. Flip Ultra gets surprisingly close in many conditions, but ultimately the FS100 or miniDV cameras have more flexible lenses.
— That said, the long end of the zoom is basically useless; there seems to be some odd feedback with the image stabiliser and the 'advanced zoom' sensor cropping (not quite digital zoom - the sensor appears to be oversize for the resolution). However, if you turn the 'advanced zoom'
off, the lens no longer zooms out so wide. Bizarre, and since the focal range is rather long anyway, extremely frustrating. In the end I leave Advanced Zoom on and try to remember not to zoom all the way in.
— On the plus side, the minimum focus distance at extreme wide zoom is amazing. It's very nearly
inside the lens shutter. Astonishing macro potential for a cheap camera.
— I've successfully hung a Rode NTG-2 shotgun mic off the jack input, with excellent results. By the time you have the mic, mount, fishpole, and cables you've spent more than the camera, but if you happen to have the bits to hand it's extremely effective. (The NTG-2 will take a battery in lieu of phantom power; you'll need an XLR-to-3.5mm cable to make it work).
— The NTG-2 (and my wired and wireless radio mics) are all mono, which of course comes out on the left channel only. I must buy an adaptor plug.
— There's no headphone jack on the FS100... but if you plug your headphones (iPod earbuds, etc) not quite all the way into the yellow AV jack, you can at least check that the camera is receiving clean audio. No volume control, but it's better than trusting to luck.
It's a decent camera, but don't expect wonders. If you want a camera to carry everywhere and muck about with, the Flip Ultra is surprisingly good (and works OK with iMovie'08 once you've installed the plugin). The FS100 is the cheapest flash-media camera I've seen with a mic input. There are cheaper miniDV cameras, but they're not great either.
For my money, the FS100 is about as good as anything this side of an HF100 or HV30. I'm not entirely happy with the low-light picture, but the microphone jack is highly significant to me. Otherwise, I have to say I think the Flip Ultra is a little gem, but that's another matter.