I’ve used the SL565 previously and have no complaints about it, in fact I recommend it to all my friends. Bought this package for use in my parents’ old farmhouse, the stone walls had a really adverse effect on the signal of their previous handsets. Registering the repeater to the base station was easy enough, but finding the right place locate it was another story. Kudos to the folks at siemens who thought of making the repeater wall mountable, very useful feature, that.