The pieces that come with it bend and break easily, and some of the pieces don’t fit that great, so you have to force it a certain way, but cautiously (as stated before, it breaks easily). Temía que no llegara el celular por los comentarios de que les llegaban pilas, etc. The noise canceling is a static whoosh sound that is fine with most music. It comes with a stickers for the top, but it holds on to the lid without any sticker. Product does give you options on rope length. I was thoroughly impressed by that. Even after loosening the strap one hole, they were still too tight. Expandable upper pocket nice also. They also fit neatly on my big head. This was a good buy I think I paid like $10 for 5 jibblitz.