As someone who is tall (6'5") and lanky, I've always had trouble finding sweatshirts that fit my arms without swimming in the body. I got the XL hoodie and was stoked to find out it had a more athletic, trim fit like most of MS's other stuff. The sleeves are long enough as is the body. In fact, this is the best fitting hoodie I've ever had and is in competition for most comfortable.
I recently wore this gem on a camping trip in the desert and kept it on in my sleeping bag through the night with the hood up. It kept me warm and comfortable the entire time. I basically wore it from the start of sundown through until about 10 in the morning when the weather warmed up.
As for style, this thing kills it. It looks sharp whether you're out ripping trails or sipping beers at the local watering hole. The simple, sleek design makes it just as wearable for climbing as it does for a casual work environment.