Chinrest works as advertised, comfortable, and highly adjustable, though it's worth noting that this has a similar, but not the same, shape as the Wittner chinrest that I was using before. Installation was incredibly difficult and the instructions included were confusing and useless. I recommend using this video (https://www.youtube.com/watch?v=zhOCdEnd6ks) to help with any problems you might have putting all of the pieces together.