Cons: No powder skirt
I've worn it in conditions from 40F to 0F. It has no insulation, but the Windstopper does it's job. I just adjust my baselayer and midlayer. At 40F you would not need anything more than a silk wicking layer. At normal winter temps I'll use a mid-weight base layer and a Marmot DriClime Windshirt as the mid-layer. That works extremely well with the Super Hero. The Super Hero does not have pit zips, but does have a very breathable material under the arms. As the DriClime Windshirt is highly breathable I have not found pit zips a necessity on this jacket.
For really cold conditions I use an expedition weight base layer and replace the DriClime Windshirt with a Patagonia Micro Puff vest. That combination works well, but does start to get a little tight around my middle. Better for me if I lost about 10 pounds.
I've also used this jacket put west. It's just a great piece for layering.