I have used my VS-100 as a stand alone unit. I recorded video and ran the audio separately to the VS-100 and saved it on the SD card. The cheap camera mic on the video camera was not very good. SO this was a great way to get better audio for live video recording.
that being said here are a few limitation I found as a stand alone.
1. The VS-100 has 6 inputs. All of the inputs only work when it is plugged into a computer. When it is a stand alone the two inputs on the front are the only ones that work.
2. As a stand alone you can only hear one prerecorded track when overdubbing. So if you recorded 3 parts you can only hear the last thing you recorded when overdubbing. (only in stand alone)
3. The SD card slot also acts as a card reader for your computer. When this function was activated I could not use it for recording. you can switch that function on or off. took me a while to figure out the problem.
Those were the only drawbacks I found. It is great for live recording or getting a stereo track when it is stand alone. So the video application worked well. but you cannot record more then 2 tracks at once as a stand alone.
I think it really shines as an Audio interface plugged into the computer. I get great recordings and the preamps are very good. The quality of recording with it plugged into a computer is very high. Act works well with this too. I have had zero issues with it.
It is built rugged and it is ready to be taken on the road. It is very reliable.