I am happy to have spent more than a competitor, in which after some time, the markings on the keyboard has solved - although the service at SL400H is not as intuitive. Now I have for over a year two handsets (and the DX 600 A ISDN). Unfortunately, I now realized that the visual impression of high quality keyboard deceptive. The film, which is applied to the lighted keys, dissolves and the digits or symbols are increasingly difficult to detect. According to the manual, the keyboard is a consumable item such as the battery, which means that it has only six months warranty. The price and the otherwise good build quality is not adequate. Too bad that a really good device only has a very limited life due to such a stigma, or at least no longer easy to operate.
