The wheel feels great and gives a fluid movement to the thumb. The user interface is not very practical when it comes to enter a phone number, the idea is to have your entire phone book already stored in the device, the navigation with the wheel is then fast.
It is available in Europe for 900 euros without VAT, it will not be sold in the USA, check out the technical features on the Serenata website or the UK product
Bang & Olufsen and Samsung mobile phone