Summary: It is great in many respects, but the software is not fully tested. For example, one can reasonably expect it to work like a mobile phone but, from the initial menu, some entries take you to a dead end and not to another menu that helps a new user to quickly sort him or herself out.
Summary: I chose this SL910A instead of the newer SL930A mainly because it has a simpler interface. The newer phone has an Android ice-cream operating system, and as I also have a mobile, I don't need my office phone to do be able to do all the fancy stuff my mobile can. Also the newer SL930A is at least £180! I have replaced my existing office phones with this. It is smaller, neater and much easier to use than all my old desk phones.
Summary: I bought this product to replace an older Gigaset system that was zapped by an electrical storm. The appearance of the handset is excellent & it was simple to setup. Most of the older Gigaset phones connected to this newer box, apart from one unit for some unknown reason. It was not easy to connect the older phones & took between minutes & several hours.