I bought this online days before my trip to seattle. i read the reviews so was aware it runs large...and it does. i practically lived in it the whole time i was there. it's very comfortable and once it cools down here in so cal i'll be back in it. some reviewers mentioned it bunched up when tied but didn't like the ties hanging loose. i just looped each one and it works great. 
it really runs large. i bought their smallest size and had ample room.