Nice and warm
I wore these on a 2 day backpacking trip in the Smokies. The temps dipping down into the low 20s and my bits were never cold. They did a nice job keeping me warm even when I was hanging out at the campsite. I'mnot sure about the durability but Ibex typically makes good products.

Great product
I highly recommend these boxers - they are great and adjust well in warm and cool environments. As you probably know they have all the advantages of wool so sweat wicking, fight odor, and dry quickly. Ibex in particular are impressive because their stuff (or these boxers anyway) are made in the USA unlike Icebreaker which are manufactured in China (though both use New Zealand merino wool). The important thing to bear in mind with these boxers is that they naturally sit quite high on the body - maybe half an inch below the belly button. For outdoor activity, etc. this is good as helps ensure no part of you is exposed but for casual wear it is a little less helpful. The boxers can sit around normal boxer height (i.e. closer to 2 inches below belly button) but then they bunch slightly. From my experience its no problem really but if you are looking purely for casual use wool boxers I'd maybe try for a pair that sit a little lower on the waist. If you are debating the value-for-money of these just consider that if they last 200 days of wear its only about 25 cents a wear. And I would be surprised if they don't last longer than that! I'm 5'10" and 165 lbs and a medium fit very nicely.

Perfect baselayer
I picked up these for backpacking, and will be getting a couple more pairs. The thickness is great, very soft, and the elastic waist is also very soft. Unbelievably nice underwear and would wear everyday if I could afford to. Merino is easy to wash and dry on the trail, and keeps you warm if conditions get cold and wet. These are the perfect weight for me, I don't see these being too hot for me at all.

Super Warm, Very Soft
They keep you very warm, and are soft to the skin. Haven't tried them in the summer yet, they may be too hot, time will tell. Another bonus is that you can get a few uses out of them before they start to stink. Also very durable. I had a pair of icebreaker merinos tear on me, but these ibex are rock solid.

Forget what you thought about wool- these are super soft!
Very comfortable. They keep you dry and odor-free! The best underwear I have ever worn. I have even worn these in mid summer and they were just as comfortable. A remarkable product from Ibex!