I laid out for an hour or so, at 36*. With my Thermarest Camprest in the pad pocket. With the pad in and a pillow under my head, the problem is not as noticeable. It really is more of an "elbow" problem than it is a "shoulder" problem, and it is really easily overcome by having my hands resting over my chest/stomach rather than by my side. As in this picture from JRB website.
http://216.83.168.206/index_files/BM...r%20Pocket.jpg Though I wonder if that will lead to some cold spots at the elbows. I was extremely warm and very comfortable, even though I was on a pad. Then sometimes my elbows are actually out a bit over the hammock edge. Of course, none of this was a problem if I turned to my side a little or completely. Which was very easy to do. This hammock makes staying on the pad a non-issue.
But I'm starting to get the feeling this hammock design is not quite wide enough for folks who are broad shouldered or other than pretty slender, even if they are well below the upper weight limitations.