I bought one pair of these and one pair of the Micro Full Cushion Crew to figure out which ones work best for my application (back country hunting). Straight away the "crew" size stands about 2" proud above a standard 8" military combat boot. I wore these on a six mile ruck with new boots and a light ~22 pound load and wore huge blisters on my heels and balls of my feet. I don't think it was the socks, but the new boots and the pace; I was maintaining a 15 minute / mile pace the whole way. I did a sock change midway and both pairs stayed perfectly in place and didn't bunch up anywhere.
I've been using them weekly for about a month and a half rucking with various loads, terrain and distances and have had zero issues with the socks. Most recently I did a 4.5 mile ruck with a 40 pound load in one hour and 10 minutes. I hoofed it out hard and had to shuffle a bit to make time. I wore women's knee high nylons under the socks and didn't need to do a sock change. I didn't get blisters or hotspots, the socks stayed in place and never bunched up or slid down....PERFECT! I still haven't decided which ones I like best because they both rock! I'll probably get another two pairs of each for different seasons.
Everything I've bought from Minus 33 is top notch. I bought two sets of mid-weight base layers over ten years ago and still use them. The first three years they were worn every day in North Dakota's (seemingly) eight month long winters while working in the oil field. I've used them hard and they are still kicking butt! Just do it, you know you want to!
