I love my HD500X, but the buttons I found to be on the small side with too low a profile. Sometimes while playing and trying to hit the FS 1, 2, 3 or 4 button, I would miss the button...or hit that protector bar things...or hit the button on the lower row...or double tap the button. The buttons just don't seem to have enough bulk and height for my taste, particularly on the top row. I went to my local hardware store and bought these Hillman Round Cap Plugs 3/4". They fit perfectly, look kinda cool and is a big improvement for me. It is like they were made for my Pod. Sweet!