I've read that the 5-stitch and CSM belts are both great belts. That said,... Has your experience with the CSM been positive or negative? Some have commented that the CSM belts is uncomfortable and "digs" in or "rubs" uncomfortably. Does this pertain to heavier..uhm...builds or thinner types. The woman at Wilderness on the telephone explained to me that thinner people usually find the CSM belt more uncomfortable. She also mentioned that the CSM belt was designed for heavier people. I'm not heavy and have no overhanging extra body fat. If you find the belt comfortable or uncomfortable please let me know if you are heavier or thin. Thanks.