I have Fibromyalgia Syndrome and Rheumatoid Arthritis. When I received these pens in my Christmas stocking a few years ago from my boyfriend, I was uncertain if they would really help reduce the pain in my hands caused by writing. I was pleasantly suprised to find they did. By using the weight of my hand and being able to loosen my grip in the pen, I am able to write longer with no pain, quite the accomplisment for a woman who cannot hardly hold a run-of-the-mill Bic pen. I highly, highly recommend this product to anyone with FMS or RA. As the years have progressed, so has my RA; as a college student, I cannot begin to explain how much these pens help me as I take notes in a three-hour-long lecture. My hands no longer cramp because I am not straining them, and my fingers do not hurt because I am not exerting additional pressure on them.