Usually image and audio works ok.
Image on default settings does not look so great.
From time to time it gets stuck on the ON state (Led is on) but nothing comes out.
Or audio MIC works but not the image.
I downloaded the latest drivers for the gspca hardware (chipset of the Eye 312) from http://moinejf.free.fr/ the current maintainer's site.
This chip has several variants. Some of them are very buggy. Some of them work from the beginning, some need a little help.