I like their gear and it's primarily what I wear, but their sizing is nothing short of ridiculous.
For instance, Attack pants measure true - so a 36 pant actually measures 36 in the waist - unlike almost all clothes manufacturers, where a 36 pant actually measures 38ish when you break out the tape measure.
That being said, the Alpine pant in a 36 actually measured 38, so I had to return mine for a 34....so just to reiterate, the 36 attack fits exactly the same as a 34 alpine pant.
Upper body is equally frustrating. Large merino fits perfect, but Large in the guide jacket is way to small, then Large in the Chugach is huge. I recently purchased a XL Peloton hoody and it's a dress with room for a significant pot belly....super disappointed and frustrated in that one.
For the record, I'm 6'1", 195 lbs, athletic build, 34.5 measured waist.
So bottom line, yes, their sizing leaves much to be desired - I've had to order almost every item I have in both L and XL to find which fits, which is extremely costly being in Canada.