I had to take these to Granite Chief in Truckee CA to get the fit totally dialed ($30) and it was worth every penny, they are ridiculously comfortable.
I've done several days inbounds where they performed well and I had a chance to break them in and get the fit dialed, then I took them on a week long backcountry ski trip where they exceeded my expectations!
I brought some light hiking boots, anticipating sparse snow cover for a half day on the way out and when the time came my Mobe's were so comfy I just hiked out in them. They kept my feet warm down to 17 degrees and it was easy to dry the liners in my bag each night. They worked great up the steepest climbs, on long flats and on descents they were fantastic. I was the only one out of five with no foot discomfort after 7 days and over 50 miles. I'm typically a 11.5 or 12 U S shoe size or a 46 euro, with medium width feet and I fit in the 29 perfectly AFTER the fit at Granite Chief. It took their expertise and a couple days before they were just right. Below is a pic during a lunchtime sock change... it's the best boot pic I had.