Summary: so far, so good, performs as promised. Adding additional handsets is easy. Just set in base unit and the base assigns it the next proper remote number so the intercom will operate properly. Memory is good and voice quality is good as well.
Excerpt: We bought the 4-pack of phones several months ago, and decided we wanted to add one more. The expansion phone took less than 30 minutes to set up after it was unpacked. We have a 5000+ sq ft house and there is clear and crisp connection to the base from anywhere in the house, yard or even down the street. Kids like the intercom/paging feature that allows them to talk as if on walkie talkies.
Pros: Easy To Set Up, Easy to Use, Efficient, Quality Construction, Reliable
Excerpt: We bought the base and two handsets and then added the extra handset. Very easy to set up, easy to use and a sleek looking phone. It has a control to adjust the sound on phone from treble to bass; this is very good for me as I have a hard time hearing. My husband and I are both very pleased with this phone.