We tried it out to see if it would be adequate enough to help us replace our home phone service. The fact that you have to dial a code out to select a line made it a deal breaker for us as it might make it too complicated for guests or babysitters. I could understand it if the unit is connected to a POTS line but you have to do this even if you don't have one. The X-link unit will automatically select the first available cell phone that's connected to it and that's what we ended up with. This unit is primarily designed to help you answer your cell phone while at home and it does so at a reasonable price. There are some compatibility issues with some phones. Worked fine with my iPhone but not so good with my wife's Samsung A737. It worked initially but once disconnected it had a difficult time reconnecting.