Steve Banks wrote a review of Mammut Nordwand TL Mountaineering Boot - Men's on August 13, 2012
Mammut has dialed in their boot fit and the Nordwand is an awesome addition to their line up. Warm, light and technical I have been very impressed thus far. The carbon shank instead of steal keeps the feet warmer and makes the boot lighter.
I have a tricky foot in a size 44 with a wide forefoot and narrow heal. These boots fit well enough for me with minimal heal lift while climbing. While I could deal with a bit more width in the front, that is always the case for me as ski boots have ravaged my feet over the years.
The boot walks well on dry trail approaches and climbs exceptionally well. During a long downpour I did experience a bit of water leaching through the orange Mammut stitching on the top, but a shot of Scotchgaurd took care of this.
I've had this boot up to 16,000 feet and was impressed with the warmth. I also did a glacier traverse the other day in a t-shirt and shorts and the boot was not too hot. Maybe they used their "cold black" technology? I'm not sure.