Has anyone here used this? I am looking at their new TELO device. I would like to be able to still use my cordless phones (2 handsets kept in different rooms) How strightforward, or not, was the hardware installation and number setup? What do you like/dislike? Easy to use? ( I have my MIL living with us) Do you use the TELO cordless handsets, or your own? Is the Premium service worth paying for? How well does the Voicemail and Caller ID work?Anything else I should know? Lots of questions I know, but any information will help. Thanks in advance!