I purchased the 3D Touch Stylus after doing pretty extensive research. I was hyped about the possibilities and eager to get started. Unfortunately, I could not use this product for more than 5 minutes straight before my arm got extremely sore. I tried setting it on a desk, setting it on my lap, and setting it on a stand-up desk, but it did not matter how high or low the surface I set it on, my arm would feel like I got punched. Maybe there is some sort of special desk setup for this stylus, but I just couldn't position it so it was confortable to use.