Why isn't there much a selection of cordless phones?
The others are very poorly made, they work but not efficiently.
The biggest issue I've seen with most of them is that most of the calls come in clearly while particular ones don't and you can barely hear them, it isn't a volume control causing it either. The other ones seem to have battery life issues.
So if you are in the market for a cordless phone you have to go at&t or Panasonic to get one with ensured good quality.