it was great until it sprung a leak after the first month, after that it was useless, the pharmacy I purchased it in closed, so I was upstream without a paddle.

I've had rotator-cuff repair surgery on both shoulders, one in '08 and the other in '09. I used the 11x14 ColPacs for the first surgery and used the 11x21 ColPacs in '09. I liked the larger ColPacs to go over the top of my shoulders with about 6" going down my back and 6" onto my chest. This was more stable that the 11x14s, which required frequent adjustment. Only downside is the weight of the 11x21, which limited the amount of time I could comfortably keep it on my shoulder when sitting up. So I used the 11x21 when laying on my back and sometimes used the 11x14 when sitting up. I sometimes used a zip-up fleece vest over the ColPacs to keep them in place; I also had a compression band that I occasionally wrapped around the ColPacs and then below my opposite shoulder around my torso. My reduction in swelling and range of motion limitation was significant, at least partially attributable to the effectiveness of ColPacs.