I have the single handle unit and so far it's held up pretty good. It's going on 9 years now. The sound quality is excellent, the range is pretty decent too it works at around 30ft away through thick walls. I've had to replace the rechargeable battery twice so far, both the original and the replacement lasted about 4 years. (II got the replacement batteries at sayal electronics).

Honestly the most reliable home phone I have ever had. It has been thru hell and still works.