I have been a long time wearer of compression gear from the start of skins onwards. I need them more and more for sore knees and back but discomfort is always a factor. My new Merinos are fantastic as they are so much more comfortable without any loss of support. I will find it hard to take them off this winter and am already thinking about a second pair!

I primarily wear tights to help support a knee issue, plus the benefits of compression are real, most of my tights are spandex / lycra (shiny) or polyamide / elastane which is cloth-like.
I needed something warmer, but not "long-john's" because I don't wear baggies or shorts over them. I use an inner comp short. Finished Wool tights for guys are hard to find.. most are made like underwear.
Be very carefully putting these on, I tore mine in the calf area, however I was able to repair it.
Since we are having a mild winter, I have had these out for my morning 6 mile trail runs in 33 - 37 degrees and felt comfortable in them. They handle the sweat by pulling it away and evaporating, even better than my polyamide Ruhn tights and it doesn’t soak it up like spandex or lycra. I recently ran them 25 miles in the forest with a temp range of 35 - 50 and I hardly noticed they were there. Did not have to adjust or pull them up, they just become part of you. Compression is just right, not rubber band like 2XU, and not flat like UA. For hard climbs and steep descents and everything in between I was impressed with the fit and performance.
My issues are:
The waist band - Even though it wasn't a real problem, it just doesn't look finished, it should look like outer-wear.
No pockets- An outside patch pocket or inner key pocket would be great.
Overall:
My goal was warmth and compression and these IO hit the mark. Aside from minor details, they are great performance wear for a relatively light garment.
I am a lot rougher on my other tights and never had a tear or problem, so the durability is in question. Since there is little or no competition in this category: Mens Wool compression tights, Im inclined to give them 5 stars.

I have worn my compression leggings a few times since they arrived and have been very impressed. Just the right balance between compression and comfort. (Not to mention a great local company)

the compression pants are absolutely fantastic. On cold mornings for cycling they keep you warm and don't allow the sweat to make you cold when you stop. They don't stink either. Great fit.
You also don't get too hot.

The weather here has been pretty varied lately. I wore these on three different runs this past week: One (14KM) high humidity at 50 degrees, one (10km) at 40 degrees, and one () in 31 degrees. These were comfortable at all three temps, and I barely even noticed I was wearing them. I'm comparing them to a pair of Under Armor leggings that don't do as well at the upper or lower range of those temps. Very pleased with these and I'll definitely be getting at least one backup pair.

I do wish there was a lighter color choice (like some of the other leggings come in gray). Fully black leggings without much in the way of reflective markings are a safety issue running at night. While I can just wear a light colored shirt and shorts, ideally I could also grab a different pair of leggings if the shirt I'm wearing is dark. That said, the black really looks fantastic, sooo ...

I was looking for compression tights that were suitable for cold temperatures and preferably made of natural fibres. These are perfect! The merino is the best quality I've worn and the synthetic mix provides good compression and durability. They fit well and feel so comfortable. I won't be wearing pure synthetics again. ioMerino is a highly ethical business and I love to support them.