Hi,
The MOVIETUBE image element does have grain - otherwise there would be nothing to focus the image on. It is actually quite visible under certain conditions and can be distracting. This imho, is a big limitation of the system. If you can live with it, fine, but in footage I've seen it's a problem. The P&S Technik and the M2 do not have this issue.
Regards,
Ian Dudley