I found a C3 at a shop this Summer and tried it on. The shell shape was good, the liner felt great, but the chin strap was just not comfortable -- too bulky and poorly located for me.
I definitely want to find a Neotec to try this year. I really hope it has all the things I liked about the C3 along with a smaller, more comfortable chin strap -- which looks very possible.
I found the chin strap extremely uncomfortable on my C3, so I sold it.
Didn't notice that in the showroom, of course.