So I got my anorak today. It's not too bad for the price, the quality is fair. It's not really all that "insulated", it's not thin, but the fleece lining is not as think as I was expecting. Think of it as a warmer slightly more water proof hooded sweatshirt. I'll wear it around a little this week and we will find out how warm is actually is. I'm guessing it would probably be comfortable down to about 40 degrees on it's own.
I wear a medium in carhartt shirts, an XL in jerzees hoodies and a large in jerzees t-shirts, the anorak I ordered is a size large and it is a little on the small size, but not too small, I probably won't be able to wear a sweatshirt under it like I had planned. A little bit shorter in the torso than I'd like but the arms are long enough for me, which is something I often have problems with. If you want to wear if over something you'd probably do well to order a size larger then usual.
Something I didn't think about when I ordered it was where it was made, which is China.
If you all have any questions about it let me know.