and it is holding up wonderfully. This will almost certainly be the last spinning disk drive I buy in my life, and I am happy to be finishing up in style. Cudos to the designers. But I found right away that I loved these caps. The cap for one of table buttons comes off because one of the legs is not perfectly aligned. The only peculiar thing is that I wish it would visually notify me when the battery is running low because the volume will just begin to subtly drop without a visual warning. Wer allerdings auf Orchestrale Spektren oder Deep-Bass-Sound steht, sollte sich vielleicht noch einmal umorientieren. Ive heard the sizing was funky but these are true to size across brands (timberland, merrell) for me. I may not be a problem for someone who grips the mouse in a different way. I am so glad I purchased these.