Really easy and straightforward to assemble too. There were NO other eartip options other than the ones that were pre installed on the headphones. Only con --terribly strong smell as soon as you open the box, it honestly took about 2 months for it to seem to be completely gone from the shoe. These do sound better than the jabras. Super comfortable and nice look. Its comes with pre-stamped labels and also extra blank labels. Mi por es delgado, y la talla en ancho normal me quedaba como lancha, compre 6 la misma talla en Narrow y me quedo perfecta. I plan to keep them as a spare pair (my spare pair quit working) and buy something else. They also include a small MicroUSB charger to the case with. My child loves them!