I was talking about the flip-up eyepiece. Mark said that the viewfinder pivot does not feel loose or wobbly, so I assume that what I experienced at NAB has to be attributed to a hastily glued together preproduction unit.
Well I have had the camera for a little over a week. I think the viewfinder is a bit on the wobbly side. It slides back and tilts up, so the mechanism needs some play on multiple axis. It should last, but as mentioned you will need to treat the camera like a $2k investment.
I think the decision to slide the viewfinder backwards is what allows it to move about 70 degrees. The little JVC GY-HM100 specs indicate it only tilts up about 45 degrees. I am pretty happy with the way the viewfinder works. But I do echo Barry's comment about the eyecup being usable for right-eye dominant only. I too am left eye dominant and I am taking a look at the i-cuff.