Bought to replace a Gigaset C450 that dropped the soul, we see the difference: superb reception in every room of the house, impeccable audio when the C450 sometimes lacked a bit. The menus are always intuitive and (practice) we just set several alarm clocks and (especially) import the C450 directory (see the Siemens site compatible devices that can "talk"). There is a red light (below the button with the envelope) that indicates whether you have a missed call: it is very visible and difficult to miss. Last thing, unlike the C450 when it is supported on its base, it is very discreet, so forget the lighthouse to cover in full night :)