Mobile based filmmaker and photographer, specializing in all things outdoors.
Body pack recorders have been around for years--how's this different? If you watch any sound guy work with one of these it's typically for nat sound on a moving subject. For example we threw one on a mountain biker to get some audio we wouldn't be able to get otherwise. No time code is going to be the killer.
It sounds like the opinions of the dual-owners are definitely the best points to listen to, but I debated this myself for a while as well before deciding on the C100. Looking back on it, I'm really confused why I ever thought I needed a BMCC. I think the fancy numbers make the BMCC sound like an awesome value, but really things like the massive file size make it less usable for daily shooting. I never thought how awesome shooting 176 minutes on a 32GB card was until I got the C100. The lack of rig brings the price down significantly as well. Built-in ND's are worth their weight in gold.
I've come to realize more and more that the BMCC would have hardly worked at all for my typical one-man shooting situation. And besides, the image quality advantage over the C100 that the BMCC delivers isn't significant enough in my opinion that a well-shot, well thought out, well edited, and well graded piece would suffer from image quality enough that people would really know.
Additionally, for what it's worth, I've received far more calls about being hired out with my C100 as I would imagine for the BMCC.