I got my Index pen it is excellent I have a spinal cord injury so I am limited use of my fingers.
I think it’s pretty amazing. You don’t have to push or tap hard like you do with the Pogo Sketch. This seems to be the in between using your finger and a pen but not quite like either one. I recommend getting this just to add to your variety of tools to use. Nothing else out there is like this one.
I purchased my Index pen and I have been using it for about a week. I love it. I know you are suppose to wear it on your index finger but I have found it more comfortable (for me) to put the ring on my middle finger and keep my index finger on the button. Either way, it is very comfortable and I feel like I have better control. At this price you cannot afford not to try it.