The size 13 fit me perfectly. Its not about getting used to the sound signature change. Unfortunately, I had to forfeit the $40 that was offered to me for a 5-star review, but I guess you cant buy love. This is a great little device for those that like to take as few trips to the ole Doc as possible. Seats in my head perfectly. But, by far and away, the worst thing about this product is its product support. ? Anyway, my oldest daughter was there when the surprise was sprung. If you are wondering, just buy it. Its too far to reach them, and if you can reach that far, youre going to knock everything over thats on the table. I like Carole Hochman pjs generally.