Overall, I've enjoyed my Airblaster Grump in Peacock, quite a lot. The jacket's 100g of insulation is nice and warm fro most days.
Size wise, I am 5'11", 170 and I went with a L. If anything it was slightly big. That said, I like a tiny bit of extra room, so it was perfect.
This jacket has lots of pockets and a removable hood, which is nice. The only change I would like to see is that the front of the hood would connect to the front flaps. Currently, the hood just wrap around and connects to itself. Without it buttoned up, it flaps around a lot, which can be annoying. I just leave my hood in the car, unless it is really cold.