At first the idea of the notebooks intrigued me, and I almost bought one, but then I really thought about what I would be doing with it... sure, sometimes writing with a pen is more enjoyable or more fitting to a task than typing, but then you have to go take pictures of what you've written. That's way too much of a barrier between writing thoughts down to organizing them.
Something like the boogie board sync[1] is exactly what evernote should have made instead of the physical notebooks. It feels enough like paper and automatically uploads when in range.