The important thing to me is that they work reliably and well. Bought two of these, but probably only needed one. Yet others are too large or two small. This book is very helpful in so, so many aspects! Perfect thing to do! Very snug in-ears and have a bigger hole for better sound than the normal tips No cons, cant think of a single one where I am very happy with the purchase. I needed a new pair but they dont make the ones I have anymore so I tried these. purchased this as a gift for my grandson who is on an Esport team at school and this is such a great way for him to carry his headset to practice and competitions seem very sturdy [but just purchased at Christmas] and his Razer headset fit perfect inside. Every pair of Skechers I owned either the sole came apart or they developed holes after about a year.