Its nice to have the different effect modes with the PXC 550, but I probably wont use them most of the time. These are great shoes, comfortable, but for the upper part of the inside. The mouse is comfortable and is a good shape and weight for myself. You click the button to save the config and it does nothing. I was on the fence about this item, I looked through the pictures and read the reviews and ultimately it seemed like it would hold the additional weight of an isolation screen. I don;t know if I got a shoe that was already returned, or what, but the elastics were floppy and stretched out. The gaskets fit well over the original trim that requires to be cut. Luckily, Reston Lloyds Calypso Basics are actually a tad under their listed dimensions of 8" and 10" and so they fit my stove perfectly. 5mm jack on the headset so you can throw a separate cord in your bag or whatever if you want to use if the battery runs out while on the go. Dies ist der Mechanik geschuldet womit es möglich ist zwischendurch das handy von horizontal auf vertikal einzustellen.