Good uphill, but heavy
I took 'em out for a day of skinning, and the NTN binding were good uphill, but not amazing. It's a heavy binding, and the tour mode doesn't pivot as freely/effortlessly as I would like, nor does it have the range of motion/pivot that I would desire. That said, they're much better than a binding without a tour mode, but I've found that others with a tour mode like the G3 Targa Ascent do go uphill better. However the downhill performance of the NTN is 2nd to none, and you couldn't pay me to switch back to my G3 Targa Ascents now that I've skied NTN's.
Pulling up the tour mode level takes some doing, and in cold, heavy CA snow I had to stomp on it with my boot to get it to go back down. But I think that will soften up over time. As a side note, my TX Pro boots broke (crack around the toe/bellows) on day 6 and are on their way back to Scarpa, and my new Crispi NTN EVO boots should arrive today. :) So although isn't not perfect yet, there's no way I'm going back to traditional tele boots & bindings.