jgfoxwrote a review of La Sportiva Trango Cube GTX Mountaineering Boot - Men's on December 20, 2015
Familiarity: I've used it several times
Fit: Runs small
I'm a 11 street shoe, 11.5 running shoe. I went with a size 45 which according to La Sportiva's shoe chart that should be the equivalent of a 11.25 size. The width was a little too snug at first but after breaking them in it is exactly where I want it for a technical rock boot. The instep is shallow though after using superfeet green insoles. The biggest issue I have with this boot is the length. It actually comes up shorter than my size 11 Asolo hiking boots and size 11 Tennies (the irony, a mountaineering boot that has a more precise fit than approach shoes). The difference in length isn't too big but on steep descents I fear for my toes and I wouldn't dare climb ice in them. I don't know if going up to a 45.5 is a wise idea because the width fit would become sloppy and I lose my edging.
I wish La Sportiva was a little better at their sizing.